You currently have $70,000 invested in shares and at the end of each year you save $6,000 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 $160,000. Round your answer up to the nearest year.

Select one:

a. 4 years

b. 5 years

c. 6 years

d. 7 years

e. 8 year