How to implement an existing class with two methods?

Good day Team

I am novice developer limited experience, but i was given a test to complete. I need all your input on this to achieve this implementation below;

// instruction from the test here below.

What must be completed:

Inside StatsCalculator.cs are 2 methods with ToDos that must be implemented. These are PlayerByPlayerNumber and TeamWinPercentage

Read the ToDo's in order to understand what each method must do.

// code sample needs implementation.

using System.Collections.Generic;

using System.Linq;

using TestCode.Models;

namespace TestCode

{

public class StatsCalculator

{

public IEnumerable TeamReferenceData { get; set; }

public IStatsWeighting StatsWeighting { get; set; }

public StatsCalculator(IEnumerable teamReferenceData, IStatsWeighting statsWeighting)

{

TeamReferenceData = teamReferenceData;

StatsWeighting = statsWeighting;

}

// TODO: Return the player for the specified player number, or null if not located.

// The playerNumber parameter must be > 0. If it is not then return a null result.

// Note

// Team.Players has the players for the team.

// Player.PlayerNumber is the field to be compared against

public Player PlayerByPlayerNumber(int playerNumber)

{

return null;

}

// TODO: For each team return their win % as well as their players win %, sorted by the team 'win %' highest to lowest.

// If a teamId is specified then return data for only that team i.e. result list will only contain a single entry

// otherwise if the teamId=0 return item data for each team in TeamReferenceData supplied in the constructor.

// If a team is specified and cannot be located then return a empty list (list must be empty and not null).

// NB! If any player on the team has played 100 or more matches then IStatsWeighting must be invoked with the required parameters

// ONLY make this call if one or more of the player matches is >= 100.

// The result must be stored in the PlayerWeighting field inside the TeamValue result class.

// If all the players within the team has played less than 100 matches each then PlayerWeighting must be set to 0.

// Note

// Team Win % is Team.Victories over Team.Matches

// Player Win % is Player.Wins over Player.Matches i.e. the sum of all players win / matches on the team.

public IEnumerable TeamWinPercentage(int teamId = 0)

{

return new List();

}