Colin invests £2350 into a savings account the bank gives 4.2% compound interest for the first four years and 4.9% thereafter how much will Colin have after 10 years to the nearest pound

Rose and andrew are financing $128,000 to purchase a condominium. they obtained a 15-year, fixed-rate loan with a rate of 5.05%. they have been given the option of purchasing up to four points to lower their rate to 4.81%. how much will the four points cost them?