Sir i am stuck for this question

Question 11 Not yet answered Marked out of 1.00 Flag question Given that X ~ N(125, 25). Let Y = 2X - 5. Find Pr(Y > 230). Select one: O a. 0.4381 O b. 0.9381 O c. 0.4332 O d. 0.0668 O e. 0.9332Question 12 Not yet answered Marked out of 1.00 Flag question " Ez(x; - x)2 = 210, give an estimate for the population standard deviation. Select one: O a. 3.2404 O b. 10 O c. 14.4914 O d. None of the others O e. 3.1623 O f. 10.5