Micmtutorial A cable that hangs between two poles at m = M and :c = M takes the shape of a catenary, with equation y = icoshmx) for some positive constant a. The amount of sag for a catenary is dened to be the difference in height between the lowest point of the cable and the height that the cable is hung at. A certain cable is 8m long and sags 3111 when hung over a street. (a) (12 points) What is a for this cable? (b) (13 points) HOW high are the ends of the cable being hung