15) From September 8, 1941 to January 27, 1944, the Germans laid the famous "900 day siege" of Leningrad, Russia, cutting all power and allowing nothing (very little) in or out, and forcing the 3 million residents to eat anything they could find, including horses, In one 5 x 5 block square, it was found there were 71 horses, in April 1943. Find the mean number of horses per block in this square. Hint: 5 x 5 = ??? a) 71 b) 1.75 c) 2.84 d) 0.352 16) See problem #15 above. Find the probability of finding two horses, in a randomly selected block of this 5 x 5 square. Assume Poisson.a) 0.776 b) 0.236 c) 0.460 d) 0.540 e) 0.224 17) See problem #15 above. Find the probability of finding at least two horses, in a randomly selected block of this 5 x 5 square. Assume Poisson. a) 0.776 b) 0.236 c) 0.460 d) 0.540 e) 0.224 18) See problem #15 above. Find the probability of finding less than two horses, in a randomly selected block of this 5 x 5 square. Assume Poisson. a) 0.776 b) 0.236 c) 0.460 d) 0.540 e) 0.224 19) See problem #15 above. Find the probability of finding more than two horses, in a randomly selected block of this 5 x 5 square. Assume Poisson. a) 0.776 b) 0.236 c) 0.460 d) 0.540 e) 0.22 20) See problem #15 above. Find the probability of finding at most two horses, in a randomly selected block of this 5 x 5 square. Assume Poisson. a) 0.776 b) 0.236 c) 0.460 d) 0.540 e) 0.224