Please answer question 4 and 5 and show a your work and steps please

4. Your parents are considering an investment in four different projects that have been presented to them for consideration. Your parents are risk averse as a results they an anxious and looking forward to recoup their investments in 2 and a half years (that is 2.5 years). Using the Payback Period method, which projects should they accept? Projects Cost Cash Flow Year One Cash Flow Year Two Cash Flow Year Three Cash Flow Year Four Cash Flow year Five Cash Flow Year Six A $10,000 $4,000 $4,000 $4,000 $4,000 $4,000 $4,000 B $25,000 $2,000 $8,000 $14,000 $20,000 $26,000 $32,000 C $45.000 $10,000 $15.000 $20,000 $20,000 $15,000 $10,000 D $100,000 $40,000 $30,000 $20,000 $10,000 SO SO 5. In a brief discussion, explain why NPV is the best investment tool among the various investment tools examined in class. Note: you first have to define NPV, before providing your explanations