Last week at an insurance company, Zach sold an average of 7 automobile and 5 homeowner policies per day over a 4-day period, Lisa sold an average of 9 automobile and 10 homeowner policies per day over a 4-day period, and York sold an average of 8 automobile and 6 homeowner policies per day over a 5-day period. Complete parts a and b below. a) Express this information as a sum of scalar multiples of three 2 x 1 matrices. (Type an integer or decimal for each matrix element. Do not simplify)