Suppose race is related to frequency of juvenile arrests, with black juveniles more likely to be arrested than white juveniles. A possible chain relationship explanation is that (1) race affects family income, with blacks tending to have lower family incomes than whites, and

(2) being poor increases the chance of being arrested as a juvenile. Show a figure to portray the chain relationship.

To support this explanation, what would need to happen to the difference between the arrest rates for whites and blacks, after controlling for family income?