Advise whether there is a good consideration provided in the following independent

situations:

a) Jonathan runs a business hiring out bicycles. He charges RM30.00 a day, payable at the

end of the hire period. Lenny agrees to hire a bicycle for a week. Half way through the

week he tells Jonathan that he is short of funds and can only pay RM10.00 a day.

Jonathan agrees to accept the lesser amount provided that he pays the money in full

straightaway. However, Jonathan later changed his mind wants to claim the balance of

RM20.00 a day.