1. A health store desires to produce a capsule of natural vitamins that contains at least 12 units f vitamin A and no less than 16 units of vitamin B. Two ingredients are available in ample supply to produce the specified vitamin capsule. Each ingredient contains both vitamins A and B, and the capsule can be produced using any one ingredient or a combination of the two. Each gm. of the ingredient one contains 3 units of vitamin A and two units of vitamin B. One gm. Of the second ingredient on the other hand , contains unit of vitamin A and 1 unit of vitamin B. If the first ingredient costs Tk. 6 per gm. And the second ingredient costs Tk. 4 per gm., what is the minimum cost of producing the capsule?