7.16 Consider the following projects: Net Cash Flow A B C D 0 -$1,800 - $1,900 $2,200 $3,000 $500 $800 $5,600 $360 $100 $600 $4,900 $4,675 $100 $500 -$3,000 $2,288 $1,000 $700 -$7,000 -$1,400 $2,100 $900 (a) Classify cach project as either simple or nonsimple. (b) Identify all positive i*s for each project. (c) Plot the present worth as a function of interest rate (i) for each project