The value of a new car of another make,

, decreases by 25% during the first year.

In the second year, its value decreases by 15% of its value at the beginning of the year.

A new car of make

costs $48,000 and a new car of make

costs $42,000.

**(a)** What is the difference between the values of the two cars at the end of the first year?

Express this differnce as a percentage of the value of the car of make A at the end of the first year.

**(b)** Calculate the difference between the values of the two cars at the end of the second year.