Complete the following items. For multiple choice items, write the letter of the correct response on your paper. For all other items, show or explain your work.Consider the expression (r³m / r^⁻m t⁴ⁿ)¹/ⁿ . (r¹/ⁿ / t²/m )^⁻m .

b. Using your answer from part (a), evaluate the expression when m=1, n=2 , and t=-3 i . Show your work.