Question: how to solve this question? (3 marks) (b) The length of time, Y (in minutes) that it takes for a company's employee to complete an

how to solve this question?

(3 marks) (b) The length of time, Y (in minutes) that it takes for a company's employee to complete an assignment is normally distributed with a mean of 100 minutes and a standard deviation of & minutes. (1) Given that 98.020e of the employees were able to complete an assignment between 90 minutes and 1 10 minutes, find the Van ". (# marks) (ii) Using the value obtained from (b)(i), (A) find E(3Y - 7Y). (4 marks) (B) Helena have been given an assignment to be submitted within 140 minutes. Given that she is currently working on her assignment for

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