What is the purpose of bid-ask spreads in the interbank spot market? Why are bid-ask spreads in the forward market larger than in the spot market?

As a foreign exchange trader, you observe the following quotes for Peruvian Sol (PEN), Uruguayan Peso (UYU) and U.S. Dollar (USD) today. Assume there are no transaction costs. PEN3.74/USD UYU10.47/PEN UYU39.45/USD Describe the sequence of transactions required to do a covered interest arbitrage for a currency trader with access to 100,000 U.S. Dollars (USD). What will happen to the three currency pairs above if more arbitrageurs enter the trade? 1. Suppose that DBS Bank in Singapore wishes to enter a swap for Thai Baht (THB) in three months' time for three months. The notional amount is 500,000 Singaporean Dollars (SGD). 2. Based on the information below, calculate and explain the cash flows associated with each swap transaction. As a foreign exchange trader, you observe the following quotes for Peruvian Sol (PEN), Uruguayan Peso (UYU) and U.S. Dollar (USD) today. Assume there are no transaction costs. PEN3.74/USD UYU10.47/PEN UYU39.45/USD Describe the sequence of transactions required to do a covered interest arbitrage for a currency trader with access to 100,000 U.S. Dollars (USD). What will happen to the three currency pairs above if more arbitrageurs enter the trade? 1. Suppose that DBS Bank in Singapore wishes to enter a swap for Thai Baht (THB) in three months' time for three months. The notional amount is 500,000 Singaporean Dollars (SGD). 2. Based on the information below, calculate and explain the cash flows associated with each swap transaction.