I need proper answer with each steps.

Suppose that there are three sessions for machine learning course, including Session 1 ($1), Session 2 ($2), and Session 3 ($2), with students coming from different majors, including Computer Science (CS). Statistics (STAT), and Management (MG). The number of students in each session is shown in the following table. Major Session 1 Session 2 Session 3 STAT 2 20 MG If a session is chosen at random with probability p($1) = 0.2, p($2) = 0.2, p($3) = 0.6, and a student in the selected session is selected to give a presentation about machine learning (with equal probability of selecting any of the students in the session), please find the following probabilities. 1) The probability of select a student majored in CS. 2) If we know that the selected student is from STAT, what is the probability that the student comes from Session 3