Explain whether the following arrangements must be made in writing in order to be enforceable.

i.A promise made by Sweet to give RM2500 to Honey who had saved her from drowning. (6 marks)

ii. A promise made Combe to his father's creditors to cover his father's betting debts. (6 marks)

iii. A promise made by a business owner to transfer his business to his eldest son. (6 marks)

(b) Explain what do you understand by 'consideration must be sufficient but need not be adequate'?