W ( t) = - 1 671. 1 sin 0. 268 t1 t∈[ 0, 1. 59 ], U∈[ - 688. 5, 0 ] 4 805. 6 sin 4 t2 - 10 436. 8cos 4 t2 t∈[ 0, 0. 417 ], U∈[ 5 813. 2, 10 436. 8 ] 9 909. 2 sin 4 t3 + 2 769. 6cos 4 t3 t∈[ 0, 0. 365 ], U∈[ 2 769. 6, 10 287 ] 2 030. 4 sin 0. 350 t4 - 888. 8cos 0. 350 t4 t∈[ 0, 2. 36 ], U∈[ - 882, 694. 2 ] - 1 655. 12 sin 4 t5 - 10 154. 8cos 4 t5 t∈[ 0, 0. 365 ], U∈[ - 10 289, - 2 769. 5 ] 9 909. 2