Can you pls help me solve this ?

3. You want to find the population mean for number of visits to Mac Donnel's from a similar neighborhood on a typical week. a. You sample 184 of Anddy's neighbors and get the mean to be 31.8 with pop std dev of 11.9. Find the 83% confidence interval for the population mean of Mac Donnel's visits. b. You sample 82 of Rilee's neighbors and find that 63 visit regularly. Find the 92% confidence interval for the population proportion of Mac Donnel's visits. What is the margin of error if the confidence interval is (72.9 cm, 89.7 cm)