7. For the random variables X, Y with joint density function I cry? (1 x)(1 - y), OSisi, osysi f(x,y) = 0, otherwise {"po (a) For what value of c is this a joint density function? (b) Using this value of e, compute the density functions of X and Y. (c) What is the value of Cov(.X,Y)? (d) Determine P{X >Y}. 7. For the random variables X, Y with joint density function I cry? (1 x)(1 - y), OSisi, osysi f(x,y) = 0, otherwise {"po (a) For what value of c is this a joint density function? (b) Using this value of e, compute the density functions of X and Y. (c) What is the value of Cov(.X,Y)? (d) Determine P{X >Y}