Please help.

1. Happy Burger and Glad Burger both have drivethrough windows. Sometimes the orders are not filled accurately. A sample of orders are taken from each restaurant. At Happy Burger, the sample had 268 accurate orders and 55 inaccurate orders. At Glad Burger, the sample had 325 accurate orders and 30 inaccurate orders. a. Is there evidence restaurants have differing proportions of accurate orders? b. Find a 90% confidence interval for the difference in proportion of accurate orders. Read carefully to make sure you are using the correct sample sizes. Be sure to write clear conclusions