To control a certain type of crop disease, it is necessary to use \(23 \mathrm{gal}\) of chemical A and \(34 \mathrm{gal}\) of chemical B. The dealer can order commercial Spray I, each container of which holds 5 gal of chemical A and 2 gal of chemical B, and commercial Spray II, each container of which holds \(2 \mathrm{gal}\) of chemical A and 7 gal of chemical B. How many containers of each type of commercial spray should be used to obtain exactly the right proportion of chemicals needed?