I need help deciphering these scenarios for LEGL2000 Business Law

1.For each of the following statements, indicate whether the requirements for a legally binding offer have been met. For any that have not been met, explain what is missing or what problem exists.

a. "I'll drive you to Halifax on Saturday."

b. On a flyer placed in your mailbox; "We have the best offer in town! A barely used Sea-Doo for $4000.00"

c. "I'll give you $1 for your new green bike."

d. "I'll pay you at least $300 for your horse, Blackie, and even more if the horse is lucky."

e. "The purchaser will pay $10 for one of the seller's laser printers, the exact model to be determined at a later date."

f. "I'm so impressed with the work you did last week, sorting and organizing the stock room, that I'm going to add a $200.00 bonus to your next pay."