please show me the step on how to get the answers

Wrate between the Mexican peso (Ps) and the euro () from the following spot rates: Ps12.45/$ and 0.7550/$. 5.18 Pura Vida. Calculate the cross rate between the Costa Rican colon and the Canadian dollar CS from the following spot rates: 2500.29/US$ and C$1.02/USS. 5.19 Around the Horn. Assuming the following quotes, calculate how a market trader at Citibank with $1,000,000 can make an intermarket arbitrage profit. 5.3 $1.5900 = 1.00 Citibank quotes U.S. dollar per pound National Westminster quotes euros per pound Deutschebank quotes U.S. dollar per euro 1.2000 = 1.00 5.4 $0.7550 = 1.00 5.20 Great Pyramids. Inspired by his recent trip to the Great Pyramids, Citibank trader Ruminder Dhillon wonders if he can make an intermarket arbitrage profit using Libyan dinars (LYD) and Saudi riyals (SAR). He has USD1,000,000 to work with so he gathers the following quotes. Is there an opportunity for an arbitrage profit? 5.5 $1.9324 = LYD1.00 SAR1.9405 = LYD1.00 Citibank quotes U.S. dollar per Libyan dinar National Bank of Kuwait quotes Saudi riyal per Libyan dinar Barclay quotes U.S. dollar per Saudi riyal 5.6 $0.2667 = SAR1.00 TAITED