Banking and Expansion of Money Supply Practice Test

Given the reserve requirement ($rr$) is 20% and an initial deposit of $\$500$ is made into Bank A, assume banks hold no excess reserves but there is a currency drain: borrowers keep 10% of each loan as cash rather than redepositing it. Which statement best describes the effect on the maximum expansion of checkable deposits compared with the no-currency-drain case?

Given the reserve requirement ($rr$) is 10% and an initial deposit of $\$2{,}000$ is made into Bank A, assume Bank A holds $$400$ in reserves (more than required) and there is no currency drain. How much can Bank A lend in the first round?