$4.)(3$ pts$)-$Ketoisovalerate $+$CoA$+NA{D}^{+}$ Isobutyryl$-$ CoA$+C{O}_2+H^{+},G^{\text{'}}=-31\mathrm{.}40k\frac{J}{m}ol$

$5.)(3$ pts$)2$ Lactates $+2$ ATP $+2H^{+}$ Fructose $+2$ ADP $+2$ Phosphate $G^{o^{\text{'}}}=122\mathrm{.}60k\frac{J}{m}ol$