G C F I R [zz f1p qQ ~sp p f z f z  z[ >5  mN [ pf  z pe   & ze T  p  ze 9  s pQ f =<  2 X GG = fQ  [ Y z[ p zz fp [   z Q  4 Q2 G j  z    [  Q< F 0  X [ e   [  e   ~ GQ w [ m (z a Q  W  Q  p L z < G  Q C  < >  Q 8  G 1  Q )  Q ! p [   Q  Q [   e G [  p 2 e  z 2 p  z ( e  z  e  z  [  z  Q  e [ < Q Q  e Q [ ~Q yze tQ mQe fG _Q[ Y< UpzG QzQ MQ< H[[ Q E2 G E= e EQ Q G p ZLz e &U d z z  M    B  z ?  b pp e z " Gp G 2Q g  Q ,  Qp 0 [ p G