Paula operates a small store, employing, two clerks and a delivery boy during the absence of Paul and of the delivery boy one of the clerks delivers a package to a point close to the store using a bicycle supplied for the delivery boys use to obligate a customer, although his ordinary employment does not include such services if the delivery boy injures someone on the way to the store, the critical issue for the store is liability to the injured party will be whether or not the delivery boy what