Consider 3 heat-generating pipes buried in the ground, as shown below. Treating the three pipes as continuous line sources, each having a strength of o, and using the method of images, determine a. The transient surface temperature, 7(x=0, y, e), for an adiabatic surface. b. The temperature of the center pipe if the surface (x = 0) is maintained at zero temperature. AIR SURFACE GROUND VX b a