please answer to all completely since it's all one question and asap. thanks

Question 3: T-shirts Problem (see Newsvendor Model Lecture) Part a: 3 points What is the under-stocking cost Cu ? Locally stored answer: Part b: 3 points What is the over-stocking cost Co ? Locally stored answer: Part et 3 points What is the service level or critical fractile? (Please state a probability with 4 decimal places (and not a percentage). Jocally stored answer: Part d: 3 points What is the corresponding x-score? Locally stored answer: Parte: 3 points What is the optimal order quantity? Please round to a whole number. Locally stored