i-Pop is a very popular electronic music band in the city. It has booked the Grand Hall for performance in the coming Sunday night.

The rental for the booking is $200,000 and a deposit in the sum of $50,000 has already been paid.

However, it was discovered on Saturday that the building structure of the Grand Hall may have been affected by the building work of the subway. The Building Department has issued a closure order for the Grand Hall.

(a) Advise i-Pop the validity of the contract.

(b) Advise i-Pop the relevant monetary arrangement in law.

HONG KONG LAW