Given the formula for an arithmetic sequence f(5) = f(4) + 3 written using a recursive formula, write the sequence using an arithmetic explicit formula. (1 point)
a. f(5) = f(1) + 3
b. f(5) = f(1) + 4
c. f(5) = f(1) + 12
d. f(5) = f(1) + 15