How do I spawn each objects to specific positions

Here's the code

Right now, i can only spawn a certain amount of monster (5 for each types of monsters) that i want to spawn, at a random positions

What i want is, to spawn [I can control the spawn amount] a certain amount of monster (5 for example), but i can specify the positions for each monsters

For examples:

For obj_game_prisoner

Instance 1, Spawn Object at X = 100, Y = 200

Instance 2 , Spawn Object at X = 150, Y = 200

Instance 3, Spawn Object at X = 200, Y = 100

Instance 4, Spawn Object at X = 99, Y = 50

Instance 5, Spawn Object at X = 124, Y = 124

Use an array for that. Please refer to this thread and find out how they were able to spawn objects using Array.