oung's modulus is quantitative measure of stiffness of an elastic material: Suppose that for metal sheets of a particular type, its mean value and standard deviation are 70 GPa and 1.9 GPa, respectively: Suppose the distribution is normal. (Round your answers to four decimal places: _ USE SALT (a) Calculate P(69 < X < 71) when n = 16_ 9876 (b) How likely is it that the sample mean diameter exceeds 71 when n = 25? .0009