The Widget Company has its monthly sales reports given by means of matrices whose rows, in order, represent the number of regular, deluxe, and extreme models sold, and the columns, in order, give the number of red, white, blue, and purple units sold. The matrices for January (J) and February (F) are shown below. Complete parts (a) through (g). 0 4 5 3 3 4 8 0 J= 4 5 6 7 F = 1 4 2 7 5 1 3 2 0 0 2 3 (a) How many white extreme models were sold in January? (Type a whole number.)