Kent State University plans to choose a better way to delivery courses among in$-$person, remote, and web instructions. The collected information is in $"$HW$3\_$Grades.csv$".$ Can you help the university to make decisions about which delivery method we should use for better performance of students? Please use the R file for HW$3$ to answer the following questions. $($Do not have any conclusion in advance before working on the problem.$)$

Question $1$: What is the mean grade for the variable "Remote"?

$73\mathrm{.}25$

$74\mathrm{.}25$

$83\mathrm{.}05$

$72\mathrm{.}35$