Katy invests £2000 in a savings account for 3 years. the account pays compound interest at an annual rate of 2.5% for the first year x% for the second year x% for the third year there is a total amount of £2124.46 in the savings account at the end of 3 years. (a) work out the rate of interest in the second year. (4) katy goes to work by train. the cost of her weekly train ticket increases by 12.5% to £225 (b) work out the cost of her weekly train ticket before this increase.