1. LAW 421 Week 3 DQ 1 To purchase this material link http://www.assignmentcloud.com/LAW-421/LAW- 421-Week-3-DQ-1 For more courses visit our website http://www.assignmentcloud.com/ LAW 421 Week 3 DQ 1 What are the essential elements necessary to form a valid contract? Provide examples of each. Under what conditions can contractual duties be modified? When does promissory estoppel apply? Provide an example.