For the protons labeled Ha and Hb in the structure, predict the characteristics of their signals in the H1 NMR spectrum: the approximate chemical shift, the splitting pattern, and the integration value. A carbon is bonded to two methyl groups and two ethyl groups. The C H 3 protons in the ethyl group are labeled as A and the C H 2 protons in the ethyl group are labeled as b. The approximate chemical shift of Ha is 5 to 6 ppm 1 ppm 3 to 4 ppm 1.6 ppm 2 ppm 1.3 ppm The approximate chemical shift of Hb is 1.3 ppm 3 to 4 ppm 1 ppm 5 to 6 ppm 1.6 ppm 2 ppm The expected splitting pattern of Ha is quintet quartet doublet multiplet singlet triplet The expected splitting pattern of Hb is doublet multiplet quartet triplet singlet