Bersatu Teguh Berhad is considering the purchase of a new bus to add to its existing fleet of tourist

busses. They are considering two possible alternatives and they have estimated that the cash flows

from the four different choices are as follows:

$($a$)$ Rank these buses in order of acceptability, using:

To find negetive value

$($i$)$ net present value $($NPV$)$ at a $15\%$ cost of capital NPV use $35\%$ or $40\%$

$($ii$)$ internal rate of return $($IRR$)$

$($iii$)$ payback period

$($b$)$ Decide the best acceptable bus to purchase if the different alternatives were mutually

exclusive and there was no capital rationing. Give reasons for your answer.help