Q1. a). If I decided to sell my entire guitar collection for RS 10, will this be valid consideration? If yes, which principle applies?

b). I enter into a contract with an architect to build my farm house. We agree on a fee of $500K for the entire project. Impressed by a friends farmhouse I contact my architect, 4 months into construction and offer to pay him another $200K for making me a nice house. At the end of the contract I pay the architect a total fee of $500K lacs. He takes me to court. Will he be able to claim the additional $200K? Give a reason for your answer.