Apulley system has an ma of 4. how much force would be necessary to pull a 200 newton box

Mechanical advantage is defined as

MA = 4

now we will have

as we need to pull up a box of weight 200 N

now by above formula we can find how much force it requires to pull up the box

so it requires 50 N force to pull the weight of 200 N

the first, second, and fifth options

the answer is a. at the equator