The distribution of incomes for a company's employees approximates a normal distribution with a mean of $37 200 and a standard deviation of $800. According to the Empirical Rule, about 95% of incomes lie between what two amounts? a) $34 800 and $39 600 O b) $35 600 and $38 800 c) $30 000 and $40 000 d) $36 400 and $38 000