01.3 E 1 Point E((1 + X)(Y2 + 23)) = Enter your answer here 02 More Independent Normal 2 Points Let X1, X2, X3, X4 be independent standard normals. 02.1 Sum of 2 squared normals 1 Point Find the density of X12 + X22. Enter your answer here Q2.2 Square root of the sum of 4 normals 1 Point Find the density of \\ X7 + X3 + X3 + X1. Enter your answer here Please select file(s) Select file(s) Q3 Binomial-binomial 2 Points Given n a positive integer and p between 0 and 1. Suppose K is a Binom(n, p) random variable and there are n random variables X1, X2, . . . , Xn. Conditional on K = k, X1, X2, . . . , Xk are Binom(k, p) and Xk+1, . . . , Xn are Binom(n - k, 1 - p). Find E(X1 + X2 + . . . + Xn) = Enter your answer here Please select file(s) Select file(s)