all of question 4

4. Let the joint probability density function of X and Y b 1315($+y). :c>0,y>0,4m+y

4. Let the joint probability density function of X and Y be 0 4.1. Draw the support of this joint p.d.f. otherwise 4.2. 4.3. 4.4. 4.5. Find the probability P(X < Y). Find the marginal p.d.f. of X. Find the marginal p.d.f. of Y. Are X and Y independent? Find Cov(X, Y).