1. Kristen's Cookies, describes a cookie baking business started by Kristen in an apartment she shares with a roommate. Kristen hires the roommate to help with the business. The flowchart below shows the process for baking cookies with various mix-ins (e.g. chocolate chip, M&Ms, raisins), and the table gives the time and resources needed in each step. Words 'same kind' mean the batches of cookies have the same mix-in ingredient, so enough dough for up to 3 dozen can be mixed at the same time. The oven is small and only one dozen cookies can be baked at a time.

1. Assume all orders are for one dozen cookies of the same kind within the dozen (i.e. orders are one dozen chocolate chip, one dozen M&Ms, etc.). What is the minimum number of trays Kristen needs to have, so that trays do not become the bottleneck?
2. Explain how the start-up time will affect the maximum number of orders Kristen can handle in a four-hour period.
3. Suppose that Kristen operates the business for a while, and then decides she wants to increase the profitability. list of ideas for Kristen to increase the profitability.