b$.$ Pershing Square Associates $($PSA$)$ munt pay tibbilities of $$4,000$ due $6$ months from now and

another $5104,0\mathrm{.}00$ due I year from now. Leea & Perrins investment Co$.$ is willing to sell him

the following rwo investments:

How much of each bond should PSA purchase in order to exactly, $($absolutely$)$ match

$($replicate the cash flows of$)$ the liabilities?

What is PSA's total cost of purchasing the bonds?