can you please show me the step-by-step process of getting the IRR (not using the excel method)

Consider the two investments with the following sequences of cash flows a. Compute for i* for each investment b. What are the NPW of each alternatives with an MARR of 15% c. If A & B are mutually exclusive, which project is more economically desirable? (Incremental) N 0 1 2 Project A -$30,000 $2,000 $6,000 $12,000 $24,000 $28,000 Project B -$15,000 $10,000 $10,000 $10,000 $10,000 $5,000 3 4 5