°fe³f AÃfSX ½ff»fZ Vf¶QûÔ IYf A·¹ffÀf IYSmÔX- ·fX + ½fXX + ³fX = ¸f + MXXX + SXX = »fX + WXXX + SX = ÀfX + SXXX + »f = ³fX + ¸fXXX + IYX = VfX + WXXX + QX = WXX + ½fXXX + ³fX = £fX + ¶fXX + SX = ÀfX + ¸fXXX + ¹fX = RYX + ÀfXX + »fX = 17