Using the Lewis electron-dot notation, show explicitly the transfer of electrons in the following redox reactions. (a)

Question:

Using the Lewis electron-dot notation, show explicitly the transfer of electrons in the following redox reactions.
(a) Pyruvate + NADH + H+ → Lactate + NAD+
(b) Acetaldehyde + NADH + H+ S Ethanol + NAD+
(c) Glyceraldehyde-3-phosphate + NAD+ → 3-Phosphoglycerate + NADH + H+ (redox reaction only)