refers to spectroscopy in organic chemistry. please answer all three questions and show/state any work. thank you!

4.The mass spectrum below is most likely of:Note: The atomic mass of C is 12, the atomic mass of H is 1, the atomic mass of N is 14, & theatomic mass of O is 16. Br exists as ~50% “Br and 50% “Br. Cl exists as ~75% “Cl and 25%37CI.MASS SPECTRUM100.-15 (72%)50 (100%)80Rel. Abundance60.-40.-20. -35 (6.296)o.-16 (1%)36 (1.6%)37 (1.9%)- 51 (3.8%) 52 (31.3%)102030405060m/zacyl bromidealkyl chloridealcoholamineether5.The mass spectrum below is most likely of:relative abundance10045808 8156020O8 888mass/charge (m/z)CH3-CH2-CH2-OHH- =aCHJ-CH2-CH2-NH2CH3-CH2-O-CH36.Earlier, you learned that alkynes could be converted to alkanes via hydrogenation (Scheme 1).Were you to run such a reaction in the lab, how could you use IR to determine when thereaction was done?Scheme 1CH3OCH2CH2CH2-HH2PU/CCH30CH2CH2CH2CH2CH3