What is the answer to the second question? Thank you!

Quiz 9 The PDE 2+2 u (x, t) - 4 02 27:2 2 ( 20 , t ) ) = 0 can be solved using D'Alembert method. That is, it has a solution of the form u(x, t) = $(x + ct) +(x - ct), where c = 2 Solve the PDE with the initial conditions 2 (2, 0) = 322 ut (x, 0) = 6 cos (x). Enter the expression for u(a, t) in the box below using Maple syntax. w(2, t) = (3/2)*(((x+2*t) 12-(x-2*t) 12, Note: the expression should be in terms of a and t, but not c