YOUR PROBLEM DONE BEFORE WAS VERY HIGH DO YOU THIN YOU CAN DO THIS ONE TOO LET ME KNOW PLEASE ASAPSolve Problem and Applications:ch 9- prob 2 at the end of chapters 9 in your textbook. 9-2: 2.  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. A.Discuss the assumptions of this model. Specifically, explanation short but containing direct answer Not long story about a lot of nothing please B. how does each variable affect demand? explanation short but containing direct answer Not long story about a lot of nothing please C. How do the variables influence each other? explanation short but containing direct answer Not long story about a lot of nothing please D. What limitations might this model have? explanation short but containing direct answer Not long story about a lot of nothing please  E. How can it be improved? Solution Tip: This is an essay ( 300 WORDS) ***** PLEASE USE EXACT PROBLEM AND SOLVE EXACTLY WHAT HE IS ASKING. HE SAID SOMETIMES ANSWERS ARENT USING DATA HE ASKED USE BOOK PLEASE OR ASK ME. I NEED BETTER GRADE