Plot[Piecewise[{{0.5 u^2, Abs[u] < 1}, {-0.5 + Abs[u], Abs[u] >= 1}}, 0], {u, -4.2, 4.2}] s = Piecewise[{{0.5 #^2, Abs[#] < 1}, {Abs[#] - 0.5, Abs[#] >= 1 ...