Please help! Use the graph to write an explicit function to represent the data and determine how much money Shelley earned in week 5.
a.)f(n) = 5(3)n − 1; f(5) = 405
b.) f(n) = 6(3)n − 1; f(5) = 486
c.)f(n) = 6(3)n; f(5) = 1,458
d.)f(n) = 6(3)n + 1; f(5) = 4,374
I WILL VOTE BRAINLIEST!