Suppose the Japanese yen exchange rate is 78.47=$1, and the British pound exchange rate is 1=$1.57. a. What is the cross-rate in terms of yen per pound? Note: Do not include the yen sign (). Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16. b. Suppose the cross-rate is 125=1. What is the arbitrage profit per dollar? Note: Do not round intermediate calculations and round your answer to 4 decimal places, e.g., 32.1616