PLEASE I WANT ANSWER IN 1 HOUR PLEASE

Identify and explain the legal impossibilities/defects in the following situation by keeping in view the law of negotiable instruments also state the correct legal way to resolve the problem in accordance with law:

"Mr. Adnan drafts a cheque bearing title "Ahmed Khan" to the tune of amount Rs. 60,000,00/- and delivers its possession to Mr. Amir who is son of Ahmed Khan. Before Mr. Amir could deliver it to Ahmed Khan, Ahmed Khan dies and now his son Mr. Amir being legal heir of his deceased father presents the same cheque before banker and receives an amount of Rs. 60,000,00/- in his bankaccount"..