Answer: Willie runs 11 miles in 77 minutes.
Explanation:
To know how many miles he will run in 77 minutes we first need to know how much minutes it takes for Willie to run 1 mile.
28/4 = 7 minutes per mile.
We now want to know how much miles Willie will run if he runs for 77 minutes.
77/7 = 11 miles.
Willie runs 11 miles in 77 minutes.