6. (13 pts) Find the Maclaurin series for f (x). [Assume that f(x) has a power series expansion. Also find the associated radius of convergence. [HINT: use Substitution method by using the series expansion from the Cheat Sheet]. SHOW WORK by expressing your answer as a power series and as a polynomial with minimum 5 non-zero terms. f(x) = x ⁵e⁻³ˣ