Please help with a-c. The last word is rI

Suppose r_RF = 9%, r_M = 14%, and b_i = 13. What is r_i the required rate of return on Stock i? Now suppose that r_RF (1) increases to 10% or (2) decreases to 8%. The slope of the SML remains constant. How would this affect r_M and r_i? Now assume that r_RF remains at 9% but r_M (1) increases to 16% or (2) falls to 13% The slope of the SML does not remain constant. How would these changes affect