Instruction: Identify whether the given problem/case scenario falls under any of the defective contracts (rescissible, voidable, unenforceable or void) or if the same is a valid contract.

1. XYZ Corporation entered into a contract with Mayor Pedro Penduko for the sale of a parcel of land owned by the government.
2. Isaac is indebted to Andrew in the amount of PhP1 Million Pesos due last August 31, 2020. Partially insolvent and knowing that Andrew may attach his (Isaac's) land in payment of his debt, Isaac entered into a contract with Justin for the sale of the said land.
3. Juan owns a parcel of land, the ownership of which is being claimed by Pedro in a civil case pending in court. During the pendency of the case, Juan sold the said land to Jose without the approval of Pedro or of the court.
4. 16 year Pedro sold the land he inherited from his parents to Mr. Francisco.
5. Y, who is a guardian of Z, sold the latter's property worth P2,000,000, for 1,800,000.
6. Mayor Ga-go of Bukid City forced Mang Tonyo to sell his land to Mayor Ga-go because Mang Tonyo's land is situated just across the location of the newly constructed airport. Mayor Ga-go also reminded Mang Tonyo that his daughter's contractual employment with the local government is due fo renewal soon. Consequently, Mang Tonyo entered into a contract of sale with Mayor Ga-go.
7. While in his lucid interval, AAA, an insane person, entered into a contract with BBB for the sale of the former's motor vehicle.

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