a$)$ Use gather$()$ to turn columns

work.AM$,$

home.AM$,$

work.PM and

home.PM into a key$-$value pair of key

and time $($see below$).$

b$)$ Use separate$()$ to split the key into location and time$\_$of$\_$day. Try piping parts a and b together

into one command.

c$)$ Using dplyr commands, find the max time for the treatment and control in the morning and afternoon.