a student simplified this expression: (3^(3)*3^(-2))/((3^(6))^(2))
step 1: (3^(-6))/(3^(12))
step 2: (1)/(3^(6)*3^(12))
step 3: (1)/(3^(18))
which of these steps contains a mistake from the previous step?
a. there are no mistakes the answer is correct
b. step 1 had the mistake correct answer to this step is (3^(1))/(3^(12))
c. step 2 had the mistake correct answer to this step is 3^(6)
d. step 3 had the mistake correct answer to this step is (1)/(3^(6))