Pamela is also keen to explore other investment opportunities that could build up an investment fund of $2m at age 60 . After walking through an investment risk profiling exercise with Pamela, you suggest that she should start regular investment into a robust growth portfolio with a potential 7% annualised returns for the next 10 years. After that, Pamela should rebalance her portfolio to a lower risk profile, with a potential 4% annualised return for the next subsequent 10 years. Inflation factor to be ignored in this computation. (a) If Pamela were to invest $10,000 yearly for the next 20 years based on your recommendations, estimate the portfolio value after 20 years. (10 marks)