Identify each of the following alkyl groups as being primary, secondary, or tertiary, and give it a systematic IUPAC name.
(a)

(b)

(c)

(d)

(e)

(f)

CH CH3 CH3 CH CH2 CH2 CH3 CH3 CH3 CHCH CH3 CH2 CH3 CH2 CH CH2 CHs CH CH3-CH2 _CH_CH3 CH3-CH2