11. Suppose the PDF is given by f (x), which is zero for x 4. It has a constant value for O 5 x 5 4. (This is a uniform distribution; each point is equally likely.) (a) Find the constant value. (b) Find the likelihood that when selecting a point at random with this distribution, it is greater than 3.5. (c) If X (x) = x (so, it equals the selected value), nd E (X) and Var(X)