1. You are considering building up an investment portfolio of stocks (S) and/or short term Treasury bills (T). The returns from both sources are judged uncertain, of course, as the following probability table indicates:

T	S
		-10%	0%	10%	20%
	6%	0	0	0.20	0.20
	8%	0	0.10	0.20	0.10
	10%	0.10	0.10	0	0

Are the returns of stock and bond independent?