5) Note: It is not necessary (in either part to this problem) to know the amount of the initial investment. a) How long will it take in years) for an investment to triple in value if the annual effective interest rate is 13%? Note: Your answer need not be an integer. b) If it takes exactly 15 years for an investment to double in value, find 'v.' Note: I asked for 'V' here rather than the annual effective rate