(1 point) For the general solution of the differential equation in X use A and B for your constants and list the functions in alphabetical order, for example y = A cos(x) + B sin(x). For the differential equation in T use the C and D.For the variabletype the word lambda and type alpha for a, otherwise treat them as you would any other variable. Use the prime notation for derivatives, so the derivative of X is written as X'. Do NOT use X'(x) The longitudinal displacement u(x,t) of a vibrating elastic bar can be modeled by a wave equation with free-end conditions a2 ac2 a2 1,0 < x < L,t> 0 at2 au ar i=0 = 0, ди ar le=L = 0,t> 0 u(3,0) = x au at It=0 = 2,0 < x