A total amount of $18,000 is available for investment. The five investment options are available with the following breakup.
Investment
|
Investment
|
Net present value of yield
|
1
|
$5,000
|
$12,000
|
2
|
$6,000
|
$15,000
|
3
|
$4,000
|
$10,000
|
4
|
$8,000
|
$20,000
|
5
|
$3,000
|
$ 9,000
|
Determine the investment for maximum yield.