What is the education level of a majority of the Power, Structural, and Technical Systems workers? associate's degree or vocational school degree
bachelor's degree or apprenticeship
bachelor's degree or master's degree
master's degree or vocational school degree

Four key marketing decision variables are price (p), advertising (a), transportation (t), and product quality (q). consumer demand (d) is influenced by these variables. the simplest model for describing demand in terms of these variables is: d = k – pp + aa + tt + qq where k, p, a, t, and q are constants. discuss the assumptions of this model. specifically, how does each variable affect demand? how do the variables influence each other? what limitations might this model have? how can it be improved?