A bank in Toronto charges $2\mathrm{.}2\%$ commission to buy and sell currencies. Assume that the current exchange rate is US $$1=C$$$1\mathrm{.}1128.$

a$.$ How many Canadian dollars will you have to pay to purchase US$$3,500?$

Round to the nearest cent

b$.$ How much commission in Canadian dollars $($C$$)$ will you pay the bank for the above transaction?

Round to the nearest cent