A large Department store operates 7 days a week.The manager setimates that the minimum number of salespersons required to provide prompt service is 12 for Monday, 18 for Tuesday, 20 for Wednesday, 28 for Thursday, 32 for Friday, and 40 each for Saturday and Sunday. Each salespersons works 5 days a week, with two consecutive off-days staggered throughout the week. For example,if 10 salesperson starts on Monday, two can take their off-days on Tuesday and Wednesday, five on Wednesday and Thursday, and three on Saturday and Sunday. Formulate LP model to determine how many salespersons should be contracted and how should their off-days be allocated.