1. Analyze and sketch this curve y=3x^4 - 8x^3 + 6x^2. Indicate critical points and label the graph. 2. Find the radius and central angle in radians of the circular sectorof maximum area having a perimeter of 16 cm. 3. A piece of wire 36in. is cut into two parts, one of which is bent into the shape of an equilateral triangle and the other into a circle. How should the wire be cut so the sum of the enclosed areas is a minimum