The following are the number of coffees had by 5 QM teachers when they graded last year's QM final exam: 2 3 3 5 6 a) What are the variance and standard deviation for the number of coffees had by teachers? (6 pts) b) What would happen to the standard deviation if each teacher drank 20% more coffee? (Would it increase, decrease or stay the same?) Explain your answer. No calculation necessary. (3 pts) c) What would happen to the standard deviation if each teacher drank one less coffee? (Would it increase, decrease or stay the same?) Explain your answer. No calculation necessary. (3 pts)

what are the answers?