Consider a bar of length 40 cm whose initial temperature is given by u(x, 0) = x(60 - *). Suppose that a² = 1½ cm²/s and that both ends of the bar are insulated. (A computer algebra system is recommended.) (a) Find the temperature u(x, t). 30 00 200 9 ΣΟ n=1 80 32 (6+ cos(n)) n² e -²² 6400 TUNX COS 40