Please show work. Thank you!

Given z = e" cos(0), r = \\ + y and 0 = 1 + y. az a. On your paper, draw a tree diagram to calculate ay (Leave the answerbox blank) Oz b. Using your tree diagram, write the formula for on your paper. ay (Leave the answerbox blank) az c. Evaluate for the given function. Give all answers in terms of I and y. ay ay (You may put your answer on paper and leave the answerbox blank.) d. Evaluate when c = 0 and y = - 7. ay az ay