7. (10 pts) Find the coordinates of the point P on the line y=2x+ 3 that is closest to the origin. What is the distance between P and the origin? 8. (10 pts) A piece of wire 13 m long is cut into two pieces. One piece is bent into a square and the other bent into an equilateral triangle. How should the wire be cut so that the total area enclosed is (a) maximum? (b) minimum?