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A small market research firm has to conduct surveys for three of their major clients (Superbikes and Auto, Kim's Fruit Market and Natalia's Farm Machinery).

A small market research firm has to conduct surveys for three of their major clients (Superbikes and Auto, Kim's Fruit Market and Natalia's Farm Machinery). The company employs four statisticians who can be assigned to these three projects. However, these employees are very busy and can therefore only handle one client each. Due to the different experience and ability of these statisticians, the time required (in hours) to finish each job will differ. The required times are shown in the table below:

Client

Statistician

Superbikes & Auto

Kim's Fruit Market

Natalia's Farm Machinery

Monica

150

210

270

William

170

230

220

Felicity

180

230

225

Ross

160

240

230

Complete the following tasks:

(a) Formulate a linear programming model to optimise the use of the company's busy statisticians.

(b) Solve the problem as a tableau model by computer. Present and interpret the solution.

(c) Suppose that the time Ross needs to complete the job for Superbikes & Auto is increased from 160 to 165 hours. What effect will this have on the optimal solution?

(d) Suppose that the time Felicity needs to complete the job for Kim's Fruit Market increases to 250 hours. What effect will this change have on the solution?

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