Queen City contains the following properties. Answer all of the following questions.

In addition, all property is currently taxed at 3% of assessed value.

(a) What is the average effective tax rate on residential property? (b) Which class of property has the highest effective tax rate? (c) Which parcel has the lowest effective tax rate? (d) What is the coefficient of dispersion (C.D.) for commercial property?

\begin{tabular}{ccc} \hline Parcel & Assessed Value & Market Value \\ \hline Residential Properties: & & \\ R-1 & $25,000 & $80,000 \\ R-2 & 30,000 & 110,000 \\ R-3 & 37,000 & 115,000 \\ R-4 & 38,000 & 165,000 \\ R-5 & 66,000 & 195,000 \\ Commercial Properties: & & \\ C-1 & $90,000 & $200,000 \\ C-2 & 165,000 & 400,000 \\ C-3 & 210,000 & 400,000 \\ C-4 & 300,000 & 1,000,000 \\ C-5 & 810,000 & 2,000,000 \\ Industrial Properties: & & \\ I-1 & $1,000,000 & $2,500,000 \\ I-2 & 1,700,000 & 4,000,000 \\ I-3 & 5,750,000 & 10,000,000 \\ \hline \end{tabular}