I WILL MARK YOU AS BRAINLIEST IF YOU ANSWER THIS

Step-by-step explanation:

The way it is changed is by the way it looks and when it changes the cubes move with it so like in figure 2 there is only one missing and in the 3 one there ore four missing and in the last one only one is missing. So it is like a pattern it goes like 1,4,1,4,1. Like that. and the way you find the area of it is by multiplying the cube from each side so there are 36 cubes in the frist one and 35 in the second one and 32 in the 2rd one and in the last one there are 35. So you have yo multiply one side by the other side and the once you did it you will get your answer.