Asquare fin with sides of length t=1 cm, overall length l.6 cm, and thermal conductivity k=10 w/rn-k is subjected to convection (h=40 w/m2-k, t,•=20°c) around its surface, including the tip. it is also generating energy (4.2x10' w/m') uniformly throughout its volume. the fin has a constant base temperature th=40°c. use the finite difference method with 5 nodes to estimate t(x). plot t(x) from the base (x=0) to the tip (x= how would your graph change if q'=o (no internal generation)?