Lat W e sent the number of new homes in thousands, purchased nationwide each month). the interest rate is r percentage points. (a) What are the units of W(r)? (b) What are the units of W"()? ( Write a complete sentence with units that gives the practical meaning of the following statement. W(6) = 115 (d) Write a complete sentence with units that gives the practical meaning of the following statement. Do not use words such as per, rate, slope, derivative or any term relating to calculus. W(6) = -20