6. DBS bank wants to expand its business in mortgage funding. To run the business, the company currently has a pool of permanent and temporary computer operators who process mortgage accounts, including posting payments and updating escrow accounts for insurance and taxes. A permanent employee can process 220 accounts per day, and a temporary operator can process 140 accounts per day. On average, the firm must process and update at least 6,300 accounts daily. The company has 32 computer workstations available. Permanent and temporary operators work 8 hours per day. In addition, a permanent operator averages about 0.4 error per day, whereas a temporary operator averages 0.9 error per day. The company wants to limit errors to 15 per day. A permanent operator is paid $120 per day, whereas a temporary operator is paid $75 per day. DBS wants to determine the number of permanent and temporary operators it needs to minimize cost. a. Formulate the model of this problem? b. What type of problem do you have? Is it Linear problem, integer problem, transportation, or network problem? c. Solve the problem you define in part a!