True/ False

1. As a general rule, ads are considered to be invitations to offer and are not considered to offer.

2. To be responsible under a quasi-contract theory, the benefitted person must have understood that he or she was benefited by an activity without the existence of a contract and kept the advantage in conditions that make it unreasonable to do so without payment.

3. As a general rule, one party to a contract cannot compel the other party to do extra tasks beyond those specified by the contract without paying further consideration.

4. If no method of accepting an offer is indicated or required in the offer's conditions, an offeree is free to accept using the same method through which the offer was conveyed in the first place.

5. In a unilateral contract, the offeror has the right to withdraw his or her offer at any point before the offeree completes the specified performance.

6. If a general contractor submits a bid based on prices from potential subcontractors, and the party requesting bids requires that bids be kept open for a specific period of time, promissory estoppel can protect the general contractor and prevent a subcontractor from withdrawing the subcontractor's proposal until that specific period of time expires.

7. According to the conventional "mirror image" concept, an offeree must accept every provision (including non-material ones) presented by the offeror in the original offer, or else the offeree's answer will be regarded a counteroffer, if not a rejection.