Q7. An investment company sells three types of pooled funds, Stan- dard (S), Deluxe (D), and Gold Star (G): i. Each unit of S contains 12 shares of stock A, 16 of stock B, and 8 of stock C. ii. Each unit of D contains 20 shares of stock A, 12 of stock B, and 12 of stock C. iii. Each unit of G contains 24 shares of stock A, 20 of stock B, and 16 of stock C. Suppose an investor wishes to purchase exactly 236 shares of stock A, 196 shares of stock B, and 152 shares of stock C by buying units of the three funds. Determine those combinations of units of S, D, and G that will meet the investor's requirements exactly using matrices