Suppose a random sample of size n=1000 is obtained from a populationwith probability of success p=0.25.a. Find the value a such that P(Pˆ ≤ a) = 0.05.b. Find the value c such that P(0.25 - c ≤ Pˆ ≤ 0.25 + c) = 0.99.c. Find the quartiles of the distribution of Pˆ.