Susan has been working late hours at work and does not have time to keep up with mowing her lawn.She has received several notices from her homeowner's association about the state of her yard and has been notified that it must be mowed by Thursday June 5.John Landscaper drives by her house everyday and has noticed the need for the grass to be mowed.John emails Susan and writes, "I see that your grass needs to be mowed.I will mow it on Saturday June 7 for $100."Susan responds by email, "You are hired!Saturday is not good though.You will need to come Wednesday or Thursday, whichever is better for you."John shows up on Saturday to mow the lawn only to find that it has just been mowed by Jack's Lawn Care.Under common law rules of contract formation did John and Susan have a contract?Why or why not?Please include applicable legal rules/ principles that support your answer.