Discuss the validity and effect of each of the following:
(a) A, B, and C, manufacturers of stereos, orally agree that due to the disastrous, cutthroat competition in the market, they will establish a reasonable price to charge their purchasers.
(b) D, E, F, and G, newspaper publishers, agree not to charge their customers more than $0.30 per newspaper.
(c) H, a distiller of liquor, and I, H’s retail distributor, agree that I should charge a price of $5 per bottle.