Help with both questions please

1. The makers of Skittles claim that 20% of Skittles candies are orange. You select a random sample of 20 Skittles from a large bag. Let p = the proportion of orange Skittles in the sample. a. Calculate the mean and the standard deviation of the sampling distribution of p. (2 pts) b. Interpret the standard deviation from part (a). (1 pt) 3. A large mail-order company advertises that it ships 90% of its orders within 3 working days. You select an SRS of 100 of the orders received in the past week for an audit. Let p = the proportion of orders in the last week that were shipped within 3 working days. a. Calculate the mean and the standard deviation of the sampling distribution of p. (2 pts) b. Interpret the standard deviation from part (a). (1 pt)