The graph shows two lines, a and b. a graph is shown with x- and y-axes labeled from 0 to 6 at increments of 1. a straight line labeled a joins the ordered pair 2, 6 with the ordered pair 6, 2. another straight line labeled b joins the ordered pair 0, 3 with the ordered pair 4.5, 6. part a: how many solutions does the pair of equations for lines a and b have? explain your answer. (5 points) part b: what is the solution to the equations of lines a and b? explain your answer. (5 points)