Relative to the center of a town, a power line runs on a straight line from a point 10 miles north of the town to a point 5 miles east of the town. A spur line is to be built from this mainline to the center of town. The cost to build a spur line is 45,000$ per mile. (hint let the town be at the organ and minimize the distance between the organ and the line y=10-2x.) a.) At what point along the power line should the spur line be built in order to minimize the cost of the spur?

b). what is the minimum cost?