Undefined symbols error during linking C++ in VS Code

Question

So I have been getting an issue where when I am compiling my classes along with the main .cpp I am getting a linking error. I am not the most versed with C++ as this is my first year coding in this language. I am using VS Code for this as well.

My Team Class:

#ifndef TEAM_H
#define TEAM_H
#include "Player.h"
#include <vector>
using namespace std;

class Team{
    public:
        Team();
        void setGold(int _Gold);
        int getGold();
        void changeGold(int _Gold);
        void setIngredients(int _Ingredients);
        int getIngredients();
        void changeIngredients(int _Gold);
        void setCookware(int _Cookware[3]);
        void changeCookware(int _Cookware[3]);
        void setArmor(int _Armor);
        int getArmor();
        void changeArmor(int _Armor);
        void addWeapon(string _Name, string _Level);
        string removeOneWeapon();
        int getWeapons();
        int getPlayers();
        void setKey(bool _Key);
        bool getKey();
        void updateFull(int _Fullness);
        static string weapons[5][2]; //First index is name, Second is level
                            //"NULL" and "NULL" = no weapon,
        static int cookware[3];//0,1,2 index's equate to number of that type of cookware
        vector<string> getTreasures();
        int getTreasureSize();
        static Player players[5];
    private:
        int gold;
        int ingredients;
        int armor;
        bool key;
        
        vector<string> treasures;
         
};
#endif

A function in another class that uses the weapons and Player array

void Game::startGame(){
    string leaderName;
    string playerOne, playerTwo, playerThree, playerFour;
    monster1.readMonsterFile("monsters.txt");
    cout << "Enter name of party leader:" << endl;
    cin >> leaderName;
    Team::players[0].setName(leaderName);
    cout << "Enter the names of other party members:" << endl;
    cin >> playerOne >> playerTwo >> playerThree >> playerFour;
    Team::players[1].setName(playerOne);
    Team::players[2].setName(playerTwo);
    Team::players[3].setName(playerThree);
    Team::players[4].setName(playerFour);
    cout << "Welcome party leader " << leaderName << " and his/her companions " << playerOne << playerTwo << playerThree << playerFour << endl;
    
}

And then the error i am getting:

Williams-MacBook-Pro:Project3 William$ g++ -std=c++11 Player.cpp Team.cpp Monster.cpp Game.cpp main.cpp
Undefined symbols for architecture x86_64:
  "Team::players", referenced from:
      Team::getPlayers() in Team-b8a69d.o
      Team::updateFull(int) in Team-b8a69d.o
      Game::startGame() in Game-98f56e.o
      Game::statusUpdate() in Game-98f56e.o
  "Team::weapons", referenced from:
      Team::Team() in Team-b8a69d.o
      Team::getWeapons() in Team-b8a69d.o
      Team::addWeapon(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >) in Team-b8a69d.o
      Team::removeOneWeapon() in Team-b8a69d.o
      Monster::attack(int, int, int) in Monster-7397ef.o
      Game::statusUpdate() in Game-98f56e.o
  "Team::cookware", referenced from:
      Team::Team() in Team-b8a69d.o
      Team::setCookware(int*) in Team-b8a69d.o
      Team::changeCookware(int*) in Team-b8a69d.o
      Game::statusUpdate() in Game-98f56e.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Any help is much appreciated!