Please assist and please show R code

Covid19 antibodies typically appear about 2 to 4 weeks after infection. A researcher took a random sample of 21 Covid-19 patients and, for each of these, determined the number of days after infection that antibodies appeared. The following are the number of days for each of the patients in our sample: 22, 25, 26, 20, 21, 19, 22, 25, 27, 25, 23, 25, 21, 12, 23, 31, 22, 2o, 20, 25, 1? It is reasonable to treat these measurements as coming from a normal distribution with unknown mean ,u and unknown standard deviation o a)Use the data to calculate an unbiased point estimate of the true mean, ,u, of days until antibodies appear after infection. E b}Use the data to find an unbiased point estimate of the population variance, 0,2 of days until antibodies appear after c} Use the data to nd the maximum likelihood estimate of the population variance, :12 , of days until antibodies appear after infection. \\:| d} Find the sample standard deviation of the above data :| e) Find the sample median of the above data. \\:| f}Create a 94% condence interval for p. { I | } 9} what critical value did 1,urou use to calculate the 94% condence interval in part f}? \\:| h}Create a 94% prediction interval for _u. [:| , :l) i] Copy,r vour R script for the above into the text box here