Sneezenomore markets a group of similar products for people suffering from the common cold. the products in this line are sold under the brand name sneezenomore. the products differ mainly in the strength of the dosage and in whether they also contain additional medications to help the consumer sleep. as an employee of sneezenomore, jill is responsible for the marketing mix for the company's products. she is also involved in any major decisions concerning the development of new products that will be included in this product line. jill serves as a(n):