Simplify the expression. *all the roots are cubed not squared* √24x^6y^2 - 2x^2√375y^2 - 3x√16x^3y^2 2x^2√3y^2 - (2)(5)x^2 √3y^2 - (3)(2)(x^3)(x^3) √2y^2 2x^2 √3y^2 - 10x^2 √3y^2 - 6x^6 √2y^2 -8√3y^2 - 6x^6 √2y^2 *again all the roots are cubed, sorry, i didn't know how to add the three*

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).