5. Let {X1, X2,..., Xn} be a random sample from N(u, o2). We are going to conduct a hypoth- esis testing that Ho : u = 10, H1 : < 10. We have already known the value of Z-statistics is z = -1.9. Based on the following output from R, calculate P(Z < z | Ho is true). Which one is true about the probability you just calculate? (6 points) > pnorm (1.9) [1] 0.9712834 (A) < 0.05 (B) > 0.05 (C) = 0.05 (D) It is impossible to calculate.