At the end of each week, mr. barton gathers loose change from his car and his pockets and puts it in a piggy bank. the matrices represent the number of pennies, nickels, dimes, and quarters he puts in the piggy bank at the end of two weeks. find the matrix that represents the total number of each coin mr. barton has saved in the two-week period. a) 8 7 10 3 b) 91 76 40 53 c) 126 41 74 19 d) 1.14 1.14 0.76 0.73 e) 4961 1403 2224 632