Given the 1H NMR spectrum and molecular formula for each of the following compounds, deduce the structure of the compound, estimate the chemical shifts of all its protons using the parameters in Tables 22.3–22.5, and assign the NMR signals to their respective protons. (a) C5H11Cl; 1H NMR (CDCl3): d 3.33 (2H, s); 1.10 (9H, s) (b) C5H10O2; 1H NMR (CDCl3): d 3.88 (1H, s); 2.25 (3H, s); 1.40 (6H, s) (c) C6H12O2; 1H NMR (CDCl3): d 3.83 (1H, s); 2.63 (2H, s); 2.18 (3H, s); 1.26 (6H, s)