refers to spectroscopy in organic chemistry. please answer both questions/all

10.The IR and proton NMR of compound D are providedbelow. The mass spec of D provides a molecularformula of CH1002. Major mass spec fragmentpeaks are also observed at m/z = 43, 60, and 73.What is the structure of compound D?DLODSDTERNSHITTANCE|%!13671065297317451238400030002008HAVENUMBERI -1150010:00580CDClaQE-30024020018013C-NMRsolvent1H-NMR132/Note: The proton NMR data is a follows: 4.1 ppm (triplet, 2H), 2.1 ppm (singlet, 3H), 1.7 ppm(multiplet, 2H), and 0.9 ppm (triplet, 3H).