You are analyzing an investment with the following cash flow…

You are analyzing an investment with the following cash flow schedule: Date Cash Flow 10/21/2025 -5000 10/31/2025 500 11/30/2025 500 12/31/2025 500 1/31/2026 500 2/28/2026 500 3/31/2026 500 4/30/2026 500 5/31/2026 500 6/30/2026 500 7/31/2026 500 8/31/2026 500 9/30/2026 500 10/15/2026 250 What Excel formula is most efficient for you to use to calculate the internal rate of return based on this irregular cash flow schedule, and what is the approximate annual rate of return?