Assuming that E is known, and assuming that the mean a has a standard normal .e., a w NW |(], I) We, show that the posterior distribution p(,u |D) is also a normal prior, 1.0., at w J's-'{nklm I) We, show that the posterior distribution Ptkll is also a normal distribution, and show that tho posterior moan is: #56: : [E + ill'llcjll yak-{En H}: A HE l