What is the vertical displacement of the basic graph to produce a graph of y=pi-3cos(x-2)?

a. pi units down
b. 2 units down
c. 3 units down
d. pi units up

Can someone me out here number 4 plz

Me. i can't figure out this question. give an explanation too. .

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.