Solve my question according to math

Def rotates 90 clockwise about point a to create d’ e’ f’. therefore, which equation must be true ?

Afigure is rotated 180°. if one of the points on the image is g'(4, -8), what were the coordinates of g? (8,4) (8,-4) (4,8) (4,8)

How much is $1200 worth at the end of1 year,if the interest rate is 5.5% is compounded quarterly.