HELP please with this case.

Cases: Please Complete in IRAC format. 10 Points each 51. Mastrangelo and Johnson entered into a written contract for the purchase by Johnson. The contract was carefully drafted to set forth the agreement of the parties. Johnson. Johnson subsequently claimed that the contract was not valid becaus of an apartment building built It was signed by e it was not signed by d not cover all the terms included in the written and oral agreements that the parties negotiations. Mastrangelo claimed that Johnson was barred from introducing had made during their prior proof of all of their prior agreements. Discuss all issues presented in IRAC format. 3sue