(a) E(B) = mc 1-8 with m = 5.64910 20 kg and c = 3 108 m/s. (b) x(t) = A sin (g/L t + y) with A = 3 mm, g = 9.81 m/s2, L = 60 cm and p = 0.4 rad. (Calculator must be in radians.)