Ex. 3.7 Assume y; ~ N(Bo + x3,0),i=1,2,..., N, and the parameters B, j = 1,...,p are each distributed as N(0, 72), independently of one another. Assuming o2 and 72 are known, and Bo is not governed by a prior (or has a flat improper prior), show that the (minus) log-posterior density of 3 is proportional to 1(i3o - EjBj) + =18 where X = 02/7.