value: 16.66 points An investment project provides cash inflows of $680 per year for 11 years. Required: (a) What is the project payback period if the initial cost is 3,400? (Click to select) (b) What is the project payback period if the initial cost is 4,624? | (Click to select) - (c) What is the project payback period if the initial cost is 8,1607 (Click to select)