Question 3: T-shirts Problem (see Newsvendor Model Lecture) Please do the T-shirts Problem with a sales price of $16 and production cost of $8. Unsold shirts can be sold off at $6. The demand is given by N(mu = 60, sigma = 12). Part a: 3 points What is the under-stocking cost Cu? Part b: 3 points What is the over-stocking cost Co? Locally stored answer: Locally stored answer: Part c: 3 points What is the service level or critical fractile? (Please state a probability with 4 decimal places (and not a percentage). Part d: 3 points What is the corresponding z-score? Part e: 3 points Locally stored answer: Locally stored answer: What is the optimal order quantity? Please round to a whole number. Locally stored answer: