Calculate the coefficients of variation for the following stocks:

Stock	Expected return	Standard deviation of return
1	0.065	0.39
2	0.03	0.17
3	0.15	0.24

part 1: What is the coefficient of variation for stock 1?

part 2: What is the coefficient of variation for stock 2?

part 3: What is the coefficient of variation for stock 3?

part 4: If you want to get the best risk-to-reward trade-off, which stock should you buy? stock 1, stock 2, or stock 3 ?