669 Hello Experts, please help this MCQ (Multiple Choice Question). I will give Like for you answer :) Thank you

A finance company employs full- and part-time staff, who work 40 and 20 hours per week, respectively. Full-time staff are paid RM800 per week and part-time staff RM320. In addition, it's company policy that the number of part-time staff should not exceed one-third of the number of full- time staff. The number of worker-hours per week required to deal with the company's work is 900. Let x denotes the number of full-time staff and y denotes the number of part-time staff. State the objective function and state whether it is to be maximized or minimized. O a. Minimize 40x + 20y O b. Minimize 800x + 320y O c. Maximize 40x + 20y O d. Maximize 800x + 320y