__ _ + + _ s + s 4%ss __ _ - -------- -- dP di 4$$$$$S S$$$$$$$ $$$$$$P $$ i$ s%%$P $$%s 4P s%%$P 4$$%s $$P s%%$P $$%s $ a $$ d$$$$$$ 4$$$$$ $$$$$$b d$$$$$$ $$$$$$b $$b 4$$$$%%s $b 4$$$ $ $$$$$$$$i $$$$$$$$ $$$$$$$$ + $$$$$ s%%$$$$ i$$$$$$$$$$$$b 4$ $$$$$$$$$$$$$$$$$$ $ i$$$$$$$$ i $$$$$ i$$$$$$$ $$$$$$$$$$$$$$b i $$$$$$$$$$$$$$$$$$ $$$$$$$$ 4$$$$ $ S$$$$$$ $$$$$$S S$$$$$b $$$$$$S S$$$$$$ +$$$$$$$$i 4$$ $ 4$$$$$$P _ db _ o $P $ $y$$$$$$i dP 4$$$$$$%%sss%$b _ _ s$i s%$$$%d $ $P soci3ty $$$$$$$$$$$$P - -+ S$$$$$$$$$$$$ $ _ + 4$ on aCid $$$$$$$$$$$ + 4$$$$$$$$ mSd SOAP d + _ + S$$S $$$$$ + P