Rebecca has been a manager at Texgen Systems for two years. She is known to be a risk taker and always waits for the next big project. She is a hard worker and takes initiative to handle critical issues. Rebecca is a .

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?