Find and sketch or graph (as in Fig. 288 in Sec. 12.3) the deflection u(x, t) of a vibrating string of length , extending from

Find and sketch or graph (as in Fig. 288 in Sec. 12.3) the deflection u(x, t) of a vibrating string of length π, extending from x = 0 to x = π, and c² = T/ρ = 4 starting with velocity zero and deflection:

1/2π - |x - 1/2π|