You invested $ $5,000$ in an account which earns

compound discount rate of $8\%$ for the first $5$ years, followed by

effective compound Interest rate of $9\%$ for the next $5$ years.

a$)$ What is the effective interest rate earned during the period

$[3,7]?$

b$)$ What is the effective discount rate earned during the period

$[4,9]?$