The money (in thousands of dollars) made from investing in stocks "Ystock" and "Zstock" are modeled as the random variables Y and Z, respectively. Assume Y and Z are independent with respective probability density functions fY (y) and fZ(z) as shown below: 1 2 3 4 1 4 1 2 3 4 1 y fY (y) 1 2 3 4 1 4 1 2 3 4 1 z fZ(z) Suppose you buy Ystock and your sister buys ZStock. What is the probability that you make more money than her; in other words, what is P(Y > Z)