Asher loves watching Numberblocks! The length of a Numberblocks episode is normally distributed, with a mean runtime of 9 minutes, and a standard deviation of 1.2 minutes.

a) (3 marks) Determine the probability a random episode is more than 11 minutes long, to 4 decimal places.

b) (3 marks) Determine the probability that a random episode is between 8 and 9 minutes long, to 4 decimal places.

Draw a rough diagram for each question, and use the method shown in class to solve.