Help quick please!!!

Chan rows at a rate of 8 mph in still water. On Wednesday, it takes him 3 hours to row upstream from his house to the park. He rows back downstream back home, and it takes him 2 hours. Which equation can be used to find s, the speed of the current in mph?


a. 3(8-s) = 2(8+s)
b. 8 + s = 3 (8 – s)
c. 8 – s = 2(8 + s)
d. 2(8 – s) = 3(8 + s)