Problem $31-5$ Cross$-$Rates and Arbitrage Suppose the Japanese yen exchange rate is $\backslash (75=\backslash$$ $1\backslash ),$ and the British pound exchange rate is $\backslash (1=\backslash$$ $1\mathrm{.}54\backslash ).$ a$.$ What is the cross$-$rate in terms of yen per pound? $($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$ b$.$ Suppose the cross$-$rate is $\backslash (120=1\backslash ).$ What is the arbitrage profit per dollar used? $($Do not round intermediate calculations and round your answer to $4$ decimal places, e$.$g$.,32\mathrm{.}1616.)$ Answer is complete but not entirely correct.