The structural unit below has been incorporated into a synthetic polymer designed to mimic the skeletal muscle protein titin (J. Am. Chem. Soc. 2009, 131, 8766–8768). In its most stable conformation (not the one shown), it forms one intramolecular hydrogen bond and four intermolecular hydrogen bonds to an identical unit in the same conformation. Draw two equivalents of this molecule and clearly show all of the interactions described above.