(2). A company uses labour and raw material to produce three products: Currently 60 units of raw material are available. Upto 90 hours of labor can be purchase at $1 per hour. Let xi be the units of product i produced, and L the number of hours of labor purchsed. Use the Lindo output below to answer each of the following parts. Make sure to give a brief explanation! (a). What is the most the company should pay for an additional unit of raw material? (b). Suppose the sale price for product 2 become 7.5 (instead of 8). What is the new z ? (c). What would be the new optimal solution if the sale price of product 3 increased by 0.5 and only 50 units of raw material are available? (d). The company is considering a 4th type of item that requires 2 hours of Labor, 3 units of raw material and sells for $4. Should the company produce any of product 4 ? maxs.t.2)3)4)6x1+8x2++13x3L3x1+4x2+6x3L2x1+2x2+5x3L06090 Range in which basis remains unchanged : objective coefficient ranges