Part-time Nanny Needed For 1 Infant

(Note: Start date is around August 1st.) I am a work-from-home mom looking for a part-time nanny (4-5hrs/day M-F or M-Th, would also consider MWF and TTh schedules for college nannies, probably about 20 hrs. a week) to care for my 4-month-old baby girl and perform light housekeeping duties (related to infant care). Preferred time is around 8:30/9am-1/2 p.m. I also have a 3yr old daughter who will be starting preschool in August but may occasionally be at home some days. We would prefer someone who could help out with light housekeeping. We would prefer a nanny who has their own car, who does not smoke, who is comfortable with pets, who is CPR certified and who has college degree