You currently have $120,000 invested in shares and at the end of each year you save $10,000 from your wages to buy more shares, adding to your portfolio. If the shares' total expected return is 15% pa and all dividends are re-invested, calculate how many years it will take your share portfolio to reach $340,000. Round your answer up to the nearest year. Select one: a. 2 years b. 3 years c. 4 years d. 5 years e. 6 years