The Coca-Cola Company is evaluating two strategic investment projects: Project A and Project B. Project A necessitates an initial investment of $1,800,000 and promises to deliver annual cash flows of $350,000 over a period of 6 years. Conversely, Project B requires an upfront investment of $2,500,000 and anticipates generating yearly cash flows of $450,000 for 5 years. Compute the internal rate of return (IRR) for both projects and provide guidance on the optimal choice, considering a discount rate of 10%.