supply chain pls solve all questions

Example 15-5: Overbooking Consider an apparel supplier that is taking orders for dresses with a Christmas motif. The production capacity available from the supplier is 5,000 dresses, and it makes $10 for each dress sold. The supplier is currently taking orders from retailers and must decide on how many orders to commit to at this time. If it has orders that exceed capacity, it has to arrange for backup capacity that results in a loss of $5 per dress. Retailers have been known to cancel their orders near the winter season as they have better visibility into expected demand. How many orders should the supplier accept if cancellations are normally distributed, with a mean of 800 and a standard deviation of 400 ? How many orders should the supplier accept if cancellations are normally distributed, with a mean of 15 percent of the orders accepted and a coefficient of variation of 0.5