Based on a given data set and chosen variable, please provide the codes for the following questions in R studio

1. choose a random sample of size 90

2. using the sample data calculate point estimates of the pop-mean, pop-sd, and pop-max.

3. choose the first 90 students as your non-random sample

4. using the non-random sample data calculate point estimates of the pop-mean, pop-sd, and pop-max.

5. compare the error size under random and non-random sampling schemes