Calculate the dollar rates of return on the following assets:
a. A painting whose price rises from to in a year.
b. A bottle of a rare Burgundy, Domaine de la Romanée-Conti 1978 whose price rises from to between 2013 and 2014.
c. A £10,000 deposit in a London bank in a year when the interest rate on pounds is 10 percent and the exchange rate moves from per pound to per pound.