could you do this by hand please

4. Given four different alternatives as shown in table below. A B Data D Initial Cost $10,000 $18,000 $25,000 $30,000 Annual Benefit $1,850 $3,500 $4,500 S5,000 IRR 13.1% 14.36% 12.4% 10.56% Required: a) The best alternative using Incremental IRR, for a MARR of 11%, 11-10 yrs. (8 pt) b) Use any method to determine how much longer than 10 years does your choice from part "a" remain as the best alternative (when does the choice for part "a" is no longer the best alternative)? (7 pt)