The produce manager at a market orders 30 lb of tomatoes, 40 lb of zucchini, and 50 lb of onions from a local farmer one week. a) write a 1 x 3 matrix a that represents the amount of each item ordered. b) the following week, the produce manager increases his order by 10%. find a matrix b that represents this order. c) find aplusb and tell what the entries represent.