explain please

The joint p.m.f. of X and Y is f(x, y) = 1/6, 0

The joint p.m.f. of X and Y is y) 1/6, 0 x + y 2, where and y are nonnegative mtegers. (a) (b) (c) (d) Sketch the support of X and Y. Record the marginal p.m.f. 's fl(x) and f2(y) in the " margins". Compute Cov(X, Y). Determine p, the correlation coefficient. Find the best-fitted line and draw it on your figure.