Q4. (a) With the help of a simple supply and demand graph, explain how an interest rate increase in US affects the demand and supply of the British Pound. What happens when the opposite scenario occurs? (4 marks) (b) With the help of a simple supply and demand graph, explain how an increase in US income level influences the demand and supply for the British Pound. (3 marks) Q4. (a) With the help of a simple supply and demand graph, explain how an interest rate increase in US affects the demand and supply of the British Pound. What happens when the opposite scenario occurs? (4 marks) (b) With the help of a simple supply and demand graph, explain how an increase in US income level influences the demand and supply for the British Pound