please solve all!! urgently.

Question No.1: Solve the following problem question all carries equal marks. a. Father promised to pay his son a sum of rupee one lakh if the son passed C.A. examination in the first attempt. The son passed the examination in the first attempt, but father failed to pay the amount as promised. Son files a suit for recovery of the amount. State along with reasons whether son can recover the amount under the Contract Act, 1872. b. Examine what is the legal position, as to the following: 1. M offered to sell his land to N for 28,000/. N replied purporting to accept the offer and enclosed a cheque for ` 8,000/. He also promised to pay the balance of 20,000/ in monthly instalments of "5,000/- each. 2. A offered to sell his house to B for' 10000/. B replied that he can accept the house for only 8,000/-. A rejected B's counter offer to buy the house for ' 8,000/. B later changed his mind and is now willing to buy the house for' 10,000/. c. Referring to the provisions of the Sale of Goods Act, 1930, state the circumstances under which when goods are delivered to the buyer "on approval" or "on sale or return" or other similar terms, the property therein passes to the buyer. Ms. Preeti owned a motor car which she handed over to Mr. Joshi on sale or return basis. After a week, Mr. Joshi pledged the motor car to Mr. Ganesh. Ms. Preeti now claims back the motor car from Mr. Ganesh. Will she succeed? Referring to the provisions of the Sale of Goods Act, 1930, decide and examine what recourse is available to Ms. Preeti. d. Mr. Samuel agreed to purchase 100 bales of cotton from Mr. Varun, out of his large stock and sent his men to take delivery of the goods. They could pack only 60 bales. Later on, there was an accidental fire and the entire stock was destroyed including 60 bales that were already packed. Referring to the provisions of the Sale of Goods Act, 1930 explain as to who will bear the loss and to what extent