Nikkie Szabo carries on a business as a sole proprietor. Her income tax (not withheld) was as follows: 2019: $50,000 2020: $58,000 2021: $62,000 1.Why does Nikkie have to make installments for 2021? Calculate the tax installments for 2021, using all three methods. 2. Recalculate the tax installments for 2021, using all three methods, assuming that Nikkie carries on a business through a corporation (not a CCPC). 3. Which method in Part B should I use, and why? Why would your answer in Part B change if the corporate income tax (not withheld) for 2021 was $2,950