Rods of copper, brass, and steel are welded together to form a Y-Shaped figure. The cross-sectional area of each rod is 2cm^2. The free end of copper rod is maintained at 100C, and the free ends of the brass and steel rods at 0C. Assume that there is no heat loss from the surfaces of the rods. The lengths of the rods are: copper, 13 cm; brass, 18 cm; steel, 24 cm. (a)What is the temperature of the junction point?