Babysitter Needed for my Children

We are looking for a great babysitter for 2 children in Concord. Our girls are 8 and 19 and are very well behaved and self sufficient. This would be afterschool care to bridge the gap of bus drop off and us getting home from work. We would prefer someone who could help out with light housekeeping and homework help. We would prefer a babysitter who has their own car, who does not smoke, who is comfortable with pets and who is CPR certified. This would be approximately 2:30pm-5:30 p.m. Tuesday-Thursdays.