1(b) Briefly explain whether the following transactions are allowed in Islam:

(i) Ahmad agreed to buy 5 gram of gold at the price of RM600. He immediately paid the amount to the seller for a delivery in 7 days. (2 marks)

(ii) Niny agreed to buy a house valued RM300,000 from Simon. She promised to pay to Simon in 5 years time. (2 marks)

(iii) Suppose Ali has RM100 note and he wants to change it into 10 pieces of RM10 notes. Lim only has 9 RM10 notes to exchange with Ali. Lim takes RM100 from Ali and promises to give the balance of RM10 to Ali later. (2 marks)