Suppose that X is a continuous random variable whose probability density function is given by fX(t) = c * (4t - 2t^2), 0 < t < 2, 0 otherwise, where c > 0 is a constant. (a) What is the value of c? (b) Compute the cumulative distribution function FX of X. (c) Find the probabilities P(X = 1) and P(X > 1). (d) Compute the variance of X.