How could an IR of the both starting substrate and product be used to confirm the identity of the product form.

https://www.youtube.com/watch?v=C8TyMRjUDQkThe video described matches exactly with what you are asked to do, except the starting compound is vanillin acetate instead of methyl 4-formylbezoate. Both procedure are from the same paper reference on your lab handout.Try to understand the content of the experiment and follow instructions for a report Writing a report:Regio-chemistry: Theoretical all 3 products are possible under metal hydride reduction, however, under this particle reaction condition only one is obtainedPredict the product from the above sequence.Provide a chemical rationale for your choice explaining why the others weren’t possibleProduct Identity: How could an IR of the both starting substrate and product be used to confirm the identity of the product form.You must refer to specific peaks (wavenumber and functional groups)Product identity: The following NMR data was obtained for the product in the reaction above:Show how this data confirmed the identity of your predicted product.H1 NMR (270 MHz, CDCl3, δ) 2.33 δ (2Η, s); 3.88 δ (3Η, s); 4.72 δ (2H, s); 7.39 δ (2H, d, J=8.2 Hz); 7.97 δ (2H, d, J=8.2 Hz)C13 NMR (270 MHz, CDCl3, δ) 52.1; 64.5; 126.4; 129.1; 129.7; 146.0; 167.0The reaction: With reasons predict the product/s that would be obtained if LiAlH4 was used instead of NaBH4.Based on the TLC obtained after stirring in an ice-water bath for 15 minutes, say with reason what course of action would you take.