A bank issues Mastercard credit cards. As a part of its annual review of the profitability of each type of credit card, the bank randomly samples 36 customers to measure

the average annual charges per card. A random sample of 36 Mastercard accounts shows the following annual spending per account (in USD): 1. Based on these randomly sampled accounts, what is the best point estimate of the true mean annual spending for Mastercard account holders? 1. Based on these randomly sampled accounts, what is the best point estimateof the true mean annual spending for Mastercard account holders? 2. Develop a 95% confidence interval estimate of the mean annual spending.Interpret this range. 3. To encourage more use of the card, the company offers a promotion that costs the bank $5 for each card that carries a balance of $3,000 or more. If the bank has 50,000 total customers, what can be stated about the cost of this program to the bank?