how do i set these up in r?

4. Use the factor function to convert the species, island and sex columns of penguins_clean to factor variables. There are many ways to do this. One of the simplest is to extract access each variable individually, use the factor function to convert it to a factor, and then assign the updated variable to the appropriate column of penguins_clean. b. Verify that this worked tsing the str function. Problem 7 # Use the mean function to find the mean of the bill_length_mm column of penguins_clean Why does it give you the value NA? b. To overcome this issue, use the mean function again, but add the argument, na.rm = TRUE. What happens when you specify this argument