please help with this statistic question about distribution, please answer the whole question,thank you.

2. Alex accidentally forgot to stock up on toilet paper before the stay-at-home order. Now he has to buy toilet paper on the black market. Though the price of toilet paper on the black market has mostly stabilized, it still varies 'orn day to day. The daily price of a generic brand lZ-pack, X, and the daily price of a generic brand (Ci-pack, Y, (in rubles) jointly follow a bivariate normal distribution with ux=2,470, ox=30, pY=l,250, cY=25, p=0.60. a) ('7) What is the probability that 2 (two) Iii-packs cost more than 1 (one) lZ-pack? b) (7) To ensure that he will not be without toilet paper ever again, Alex buys '7 (seven) lZ-packs and 13 (eighteen) 6-packs. What is the probability that he paid more than 40,000 rubles? c) (7) Suppose that today's price of a lZ-paek is 2,460 rubles. What is the probability that a 6-pack costs less than 1,234 rubles today? [ 1 US dollar is approximately 75 rubles]