Today is 1 January 2024. Ella used $200,000 to purchase a florist business in Sydney. To operate this business, Ella needs to pay rent, maintenance costs, and labor costs. Here are the details: Rent will be paid by the end of each month with an amount of $2,000. Labor cost will be paid by the end of each month with an amount of $10,000. Maintenance cost will be paid by the end of each quarter with an amount of $500. Ella predicts that this florist franchise initially can have monthly revenue of $13,000. Assume that Ella can obtain this amount by the end of each month. Ella forecasts that this revenue amount will increase at the rate of y% p.a. The revenue increase will only happen at the beginning of each year. For example, this florist franchise initially has monthly revenue of $13,000 in 2024. Then the revenue amount will become $13,000(1+y%) per month in 2025 and $13,000(1+ y%) per month in 2026. Ella plans to run this business for three years and predicts that she can sell this business on 1 January 2027 with an amount of $210,000. a. Calculate the monthly net cash flows. Assume that Ella can reinvest all profit at a rate of 4.5% p.a. Use Goal Seek to find revenue increasing rate y% p.a. if Ella requires a holding period yield rate of 7.5% p.a. for this investment (from 1 January 2024 to 1 January 2027). Label this sheet as "Part a". b. Given that Ella needs to pay tax for her profit at a rate of 20% and tax is paid by the end of each quarter, calculate the monthly net cash flows (Assume that Ella does not need to pay tax for the proceeds from selling the business.). Assume that Ella can reinvest all after-tax profit at a rate of 4.8% p.a. Use Goal Seek to find revenue increasing rate y% p.a. if Ella requires a holding period yield rate of 7.5% p.a. for this investment (from 1 January 2024 to 1 January 2027). Label this sheet as "Part b". For example, if Ella's tax amounts are $500, $600 and $550 for January 2024, February 2024, and March 2024 respectively, she needs make the tax payment of $1,650 for this quarter by the end of March 2024