1 point Let ry. X = the time in hours until her first walk-in on a Tuesday shift. What is the distribution of X? Hint: How many hours are in a shift? O a. X ~ Exp(0.6) O b. X ~ Exp(2.4) O c.X ~ Gamma(4, 2.4) O d. X ~ Gamma(1, 2.4) O e. X ~ Gamma(4, 0.6) O f. X ~ Gamma(1, 0.6) O g. None of the above. 1 point FORMULA. What is the probability that she will wait more than 2.8 hours for the first customer of a Sunday shift? (Use four digits after the decimal point, e.g., 0.1234) Type your answer. 1 point FORMULA. On the first week of the semester, the Help Desk is busier than usual. In that week, the rate of walk-ins is 8.4 arrivals per shift, and our student worker can take a 15- minute break after 3 customers. What is the expected number of MINUTES it takes to receive 3 walk-ins? (Use four digits after the decimal point, e.g., 0.1234) For simplicity, we will not count the time it takes for the student to solve the walk-in problem. In other words, assume that attending a walk-in takes zero time and that our student is ready to receive a new walk-in immediately. Hint: Do not round ), keep all the decimals that you can while doing calculations. Type your