Josef invested $400 into an RRSP that earned interest at 5.5% compounded semi-annually for four years. (a) Find the balance of the account at the end of the period. (b) How much interest is earned? (c) What is the effective rate of interest? (a) The balance of the account at the end of the period is $|:|. (Round the nal answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (b) The amount of interest earned is $|:|. (Round the nal answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (c) The effective rate of interest is |:|%. (Round the nal answer to four decimal places as needed. Round all intermediate values to six decimal places as needed.)