Can you please help me analyze this NMR spectrum, including what molecule it is, which peaks correspond to which parts (Hydrogens) on the molecule.

Can you please help me analyze this NMR spectrum, including what molecule it is, which peaks correspond to which parts (Hydrogens) on the molecule. I’m having trouble differentiating whether it is an E or Z isomer and which peaks correspond to which. Also, where are the vinylic protons and what are their peaks. This is a Wittig reaction using KOH as the base to make the phosphonium salt and 3-nitrobenzaldehyde for the reaction. Please provide detailed explanation since I want to understand the material rather than just answers. Thank you so much.