please post the sequence and answer in EXCEL for a and b

3. Based mutually exclusive alternatives in the table below a) What is the incremental IRR for A2-A1? b) What is the incremental IRR for the next pair of alternatives? c) Which alternative would you select? MARR- 10% Project A3 ($15,000) ($20,000) ($25,000) $9,000 $12,000 $17,000 21.5% Project A1 Project A2 $7,500 $7,500 $7,500 235% $8,000 $15,000 $5,000 20.0% IRR