PROEUS DARA y F(2. 4) 0 fi bl::tH 8 fi fHl5 = 2 lJ u : V(2, 1) X + k 0 2 8 88 2 rlll m: 0 fi fi + ) m sng 'I ' . 2 8 0 Snrl m u fOX= "'* j:l = -2 '1 . 0 0 . firlbli fi u . 3) , 'I - k) + + = 0