The company manufactures 3 color tv sets, models X,Y, and Z. Model X needs 2 hr of electronics work, 2 hr of assembly time and 1 hr of finishing time. Model Y needs 1, 3 and 1 hours of electronic, assembly and finishing time, respectively. Model Z needs 3, 2, and 2 hours of electronic, assembly and finishing time respectively. There are 100 hours available for electronics, 100 for assembly and 65 for completing per week. How many of each model must be produced every week if all available time should be utilized?