In a computer lab there is a 75% chance that a student ends up using a computer with a small monitor (call this event M). In this case, the length of time that the student works is X|M~ N( = 40, o = 3). However, if the monitor is large (call this M), the length of time that the student works is increased by N(= 5,0 = 1). (i) What is the distribution of X| M? (ii) Calculate Pr(X 43| M) and Pr(X 43| M).