Consider the following reaction, in which two electrons are transferred from cytochrome-c (reduced):

2cyct c[fe2+] + pyruvate+ 2h+> 2cyt c[fe3+] +lactate

a) \varepsilon 0 for the reaction at ph 7 and 298k

b) calculate the equilibrium constant for the reaction at ph 7 298k

c) calculate the gibbs free energy change for the reaction at ph 7 and 298k

d)calculate the gibbs free energy change (at ph7 and 298k) if the lactate concentration is five times the pyruvate concentration and the cytochrome c (fe3+) is ten times the cytochrome c (fe2+)