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K # )! ) !) "#< OM * ) !) #< * #) & #< 2 M 3 3 A ∴ −G F M − ' )! - , $ 1 " & & ! "' ) &-$ # ' ) ! & " # # " < "# "* 6 & 1 " # ! 0 # < ! "! & - * ; # ) & # < G 2−G F 3 ) !) ( "! < & " & # ! ) !) ! " . &- " & " ! " "$ 1 " " , ") ; " ) ! B*K 3 6 "! < # & '" !" #, ) & !" ) !) G/ H < 0 "# G/ H "! ! ! ?/@ H/F/H/H ' /H /H N ! "$ 0!" & FH ' FH F/H * " ! #, ! N ' # ' ( )! 0 !" !" " ; 0!" !" & # " ! ) & 6* &! ; #! "! & - "# ! : !# & # < !) "# &! ; #! " " $ # * ! $ ! ) !0 " & ! " & "! & - " ! )! #! !" !" 8 !" " "# &! ; #! "! & - " 2 E ∝' ) " ! "# # !" * ! ) !0 & G/ E < / E 3 E < 2 3 E G E < E E "# < ! " #" & & &- * E G* & # &! ; #! "! & "$ & ! "* " $ #! < ! " "! & - * "# & "! " % ( G2 ! "1 G 3* : $ < %& ( " & ! &! ! #!" " ) ! " ! < < G2 3 E B E 2 3 E E ≠ G "# < ! " #" & & &- * $ $ G − J ≥ A − G 03 6 "! < "# & "! " & " G$ ! &! )! ≥ A$ −A> G − B ) !) #) & G$ B − B ≥ A$ B − A G =/ H KB ≥ A/ H =/ H A/ HKB ≥ A/ H A/ H / H KB N KB ≥ H ≥ H BB' − − / ' !& ) & #! "! & - 1 E B* : $ & ! 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