Last week andrew bought 3 lbs. of zucchini and 2 lbs. of tomatoes for $7.05 at a farm stand. this week he bought 4 lbs. of zucchini and 3 lbs. of tomatoes, at the same prices, for $9.83. what is the cost of 1 pound zucchini and 1 pound of tomatoes at the farm stand?