Option A: Invest $1711 for 5 years at 17% p.a. compounded monthly for the first 2 years then 10% p.a., compounded semi-annually for the remaining period. No compounding occurs after year 5.

Option B: Invest $1711 at 3% p.a. compounded continuously.

How many years will it take for option B to have the same future value as Option A?

Note:Just put a number in the box. Round your answer to 2 decimal places.