Continuous r.v.s ???????? and Y2 have the Joint P.D.F. ????(????????,????????)=???? (????????^????+????????) for ???????????????????????????^???? and ???????????????????.
(b). In order to compute the probability ????(????????? ????????+????), set up the following integration by finding the values of ????,????,????, and D. Check the order of integrations. Do not need to complete the integration.