FIGURE P$5-67$

$5-75$ Steady$-$state temperatures $($K$)$ at three nodal poi of a two$-$dimensional system with a thermal conductivity $k=20\frac{W}{m}*K$ are shown in Fig. P$5-75.$ The grid spacing is $5$ Ix The $2-$D system experiences a uniform volumetric heat generat rate of $5{10}^7\frac{W}{m^3}.$ The top and right sides of the system insulated, while the left and the botom sides are maintained $t$ constant temperature of $300$ K $.$ Determine $T_1,T_2,$ and $T_3(K).$