What is the surface area of the rectangular pyramid

Number 1 is 12

Number 2 is 8
Number 4 is 326
Number 5 is 476.85

I can't really put the answer for number 3 because it's kind of hard to

To calculate the surface area of a rectangular pyramid, you need to find the area of each of the five faces and then add them together.

The formula for the surface area of a rectangular pyramid is:
Surface Area = Base Area + (1/2 * Perimeter of Base * Slant Height)

Where:
Base Area = length of base * width of base
Perimeter of Base = 2 * (length of base + width of base)
Slant Height = height of the pyramid

Add the area of the base to the area of the four triangular faces to get the total surface area of the rectangular pyramid.