Suppose that X₁, X2, ‚ X₁ form a random sample from the normal distribution with unknown mean µ and unknown standard deviation σ. (a) Write down the expressions of the M.L.E. μ of μ and the M.L.E. ô of o. (No work needed here.) ô = (b) For n = 10, find a value k such that P(μ <μ+kô) = 0.95. k=