how to fix unexpected symbol 'MonsterPrefab' error CS1525 for a tower survival game

Questions & Answers
1

I tried using this code in c sharp script but could not get the script to work.
It always kept saying ,"Assets/PlaceMonster.cs(8,52): error CS1525: Unexpected symbol ‘MonsterPrefab’, expecting ‘(’,‘)’,‘,’,‘;’,‘[’,‘{’, or ‘’
using UnityEngine;
using System.Collections;

public class PlaceMonster : MonoBehaviour {

// Use this for initialization
void Start () {
		new GameObject MonsterPrefab;
		new GameObject Monster;
		
		private bool canPlaceMonster ()
	{
			return Monster == null;
		}
		//1s
		void OnMouseUp ()
		{
			//2
			if (canPlaceMonster ()) {
				//3
				Monster = (GameObject)
					Instantiate (MonsterPrefab, transform.position, Quaternion.identity);
				//4
				AudioSource audioSource = gameObject.GetComponent<AudioSource> ();
				audioSource.PlayOneShot (audioSource.clip);
				
				// TODO: Deduct gold
		}
	}
}

}

Please help

2

This script is not fully formatted. Try to re-format, then check your start function curly bracket(close).