So (8 - 20) dv = 8v-12 = 1 7 Therefore pu.v(u, v) over the above defined region is indeed a probability density function.(b) Plot the probability distribution of the annual change in storage. (0) If [31 = 100,000, (11 = 20,000, [32 = 70,000 and (12 = 50,000, what is the probability that the change in storage will be 1) negative and ii) greater than 15,000 acre-feet