I'm having an issue with a plugin I'm creating and it refuses to compile and gives me this error: Error while compiling: IslandPatrol.cs(41,85): error CS1503: Argument `#3' cannot convert `method group' expression to type `string'

This is the code from line 41 to 85

// Schedule event check
    timer.Every(60, CheckEventStatus);
}

privatevoidcmdForceEvent(IPlayerplayer, stringcommand, string[] args)
{
    if (player.IsAdmin)
    {
        Puts("Forcing Island Patrol event...");

        // Call the StartEvent method to simulate the event start
        StartEvent();
    }
}


        privatevoidCheckEventStatus()
        {
            if (DateTime.UtcNow>=nextEventTime&&!isEventActive)
            {
                StartEvent();
            }
        }

        privatevoidStartEvent()
        {
            // Spawn helicopters, CH-47s, Bradleys, and F-15s here
            SpawnHelicopters();
            SpawnCH47s();
            SpawnBradleys();
            SpawnF15s();

            isEventActive=true;
            timer.Once(UnityEngine.Random.Range(900, 1800), EndEvent); // Event lasts 15-30 mins
        }

       privatevoidSpawnHelicopters()
{  
     Vector3spawnPosition=newVector3(-2855, 47, -150); // Declare and set spawn coordinates

    floatspawnInterval=5.0f;
   
    for (inti=0; i<numberOfHelicopters; i++)
    {
        timer.Once(i*spawnInterval, () =>
    1. Error while compiling: IslandPatrol.cs(132,116): error CS0841: A local variable `spawnPosition' cannot be used before it i