Give me the total are thank youu

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Find the slope of the line that passes through the points (-2, 4) and (-5, -6). -2/7 10/3 -2/3

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).