d$.$ Mr$.$ Mwansa decided to use part of retirement package to invest in the heavy duty equipment for road construction. Based on the data given in the table $1,$ calculate the payback period using the interest rate of $12\%.$

$15$

e$.$ What advice would you give to Mr$.$ Zulu if he intends to purchase a same type of equipment using a bank loan with a maximum repayment period of $60$ months?

$2$

Table $1$: Details of the costs

$\backslash$table$[[$Details$,2019,2020,2021,2022,2023,2024,2025,2026],[\backslash$table$[[$Cost of Purchase of a$],[$equipment$]],450,000,,,,,,,],[\backslash$table$[[$Cost of fucl and$],[$mainienance$]],,15,500,15,500,17,000,18,000,20,000,22,000,25,000],[\backslash$table$[[$Income earned from hiring$],[$out the equipment$]],,160,960,190,000,210,000,220,000,240,000,260,000,20,000$