When Sara became ill, Mary performed housekeeping services for Sara without any agreement that Mary be paid. Sara requested the services, and Mary expected to be paid. Sara died. In a lawsuit seeking compensation for Mary, the court ruled a contract existed. What kind of contract is it? Explain.(As you formulate an answer, consider two common instances wherein a contract exists: ordering food at a restaurant; getting your hair cut or styled.)

Julie plans a summer trip to Europe. Her best friend, Karen, has been accepted to medical school in the fall. Karen says, "Julie, while on your trip, if you buy a microscope for me, I will give you $1,000.00." Julie buys the microscope in Europe and returns home. Does a contract exist? Explain.(As you formulate an answer, consider how the facts in this question satisfy the elements of offer and acceptance.)