Let r ( t) = u(t) x v(t), where u and v are two differentiable vector functions defined on R, and u and v satisfy u(t) = (2t - 5, 3t*, 8e-ty v(0) = (1, 2, 1) and v (0) = (0, 1, -1). Use differentiation rules to determine the second component of the vector r (0). Do not round the