Jack is building Jill a chicken coup for $20,000. Jill selects the weatherboard style and pays Jack a $5,000 deposit.

Partway through, Jill decides she doesnt like weatherboard and wants Jack to change to brick.

Jack refuses and dismantles the work done and sells the weatherboard coup in parts/materials to Jan for $10,000.

a. advise jack if there is a contract

b. advise whether jill is entitled to recover her deposit

c. what if jack instead of selling the parts to jan, rejects jans offer and decides to burn the parts instead.