please answer the question in the picture, and give process, thanks

Question 2 Difficulty: all Hiroshi and Giulio share a common investment goal and once they reach their goals, they will withdraw their money. Giulio starts out with 3 times as much money as Hiroshi and it takes Hiroshi 5 times longer than Giulio to reach this goal. They both use the same bank that provides a 5% annual interest rate compounded quarterly. Work out how long it takes Hiroshi to reach his investment goal? Give your answer correct to the nearest year