You buy $200$ shares of arsenal companies, Inc. at $$50$ pershares,. Three months later, you sell these shares for $$58\mathrm{.}5$ per share. For each transaction you paid $$300$ commission. You received no dividends.

Based on the above, calculate:

a$.$ Dollar return

b$.$ Percentage return

c$.$ Annualized return

d$.$ Effective annual rate