solve all please in comparison to the case study

Mohammed Saeed, who was engaged in a construction project, leased a crane from Ahmed Equipment and hired Crosstown Trucking Company to deliver the crane to the construction site. Crosstown, while the crane was in its possession and without permission from either Saeed or Ahmed Equipment, used the crane to install a transformer for a utility company, which paid Crosstown for the job. Crosstown then delivered the crane to Saeed's construction site at the appointed time of delivery. When Ahmed Equipment learned of the unauthorized use of the crane by Crosstown, it sued Crosstown for damages, seeking to recover the rental value of Crosstown's use of the crane. Using the information presented in class and it the textbook, answer the following questions. 1. What are the four requirements of a valid contract? 2. Did Crosstown have a valid contract with Saeed concerning the use of the crane? If so, was it a bilateral or a unilateral contract? Explain. 3. What are the requirements of an implied-in-fact contract? 4. Can Ahmed Equipment obtain damages from Crosstown based on an implied-in- fact contract? Why or why not