Please help me I dpnt know the answer and I dont want to do it

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Standard deviation of 19,29,21,22,23