XYZ Inc. wants to revise the arrangement it agreed to with its two sales employees, Susan and Rafael, who have both been working with XYZ for many years.It wants to stop paying for dental insurance for both employees.After discussing this with them, Susan suggests that she is ok with this if XYZ increases her pay by $500 per month.Rafael says he wants to keep his current arrangement.Explain how XYZ needs to proceed in each case to modify the contract in both scenarios so that the modification is legally enforceable? (3 marks)