Please help, I am very confused on how to go about doing these two problems.

1. Traders often buy foreign currency in hope of making money when the currency's value changes. For example, on July 6, 2011, one U.S. dollar could purchase 0.6985 Euros and one Euro could purchase 1.3822 Canadian dollars. Let f(x) represent the number of Euros you can buy with x dollars and let g(x) represent the number of Canadian dollars you can buy with x Euros.

a. Find a function that relates dollars to Euros

b. Find a function that relates Euros to Canadian Dollars.

c. Then use the results of a) and b) to find a function that relates U.S. Dollars to Canadian Dollars.

2. You make a purchase at a local store, but what you've bought is too big to take home in your car. For a small fee, you arrange to have the store deliver your purchase. You pay for your purchase, plus the sales tax, plus the fee. The tax rate is 8.5% and the delivery fee is $30.

a. Write a function P(x) for the total, including taxes, on the purchase amount x.

b. Write a function T(x) for the total, including the delivery fee, on the purchase amount x.

c. Calculate and interpret (P*T)(x) and (T*P)(x). Which results in a lower cost to you?

If someone would be able to help me with these two problems it would be greatly appreciated! Thank you!