Exercise $3.$ Caterpillar USA needs to accumulate $$7\mathrm{.}5$ million to retire a bond issue that matures in $5$

years. The firm's manufacturing division can contribute $$150,000$ per quarter for the next $5$ years to an

account that will pay $2\%$ quarterly. How much will the remaining Caterpillar divisions have to contribute

every month to a second account that pays $0\mathrm{.}5\%$ per month in order to reach the $$7\mathrm{.}5$ million goal in $5$

years?