Please help me out here I'm failing math. −4r − 11 = 4r + 21

12(6 − y) = y

4(4−w) = 3(2w +2)

3(6 + 5y) = 2(−5 + 4y)

1.4f + 1.1 = 8.3 − f

The discrete random variables x and y take integer values with joint probability distribution given by f (x,y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x,y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).