The Grand Canyon and the Colorado River Are Beautiful, Rugged $\begin{array} { l l l l l l l l l l l } 4 & 5 & 3 & 3 & 5 & 6 & 7 & 10 & 5 & 3 & 5 \end{array}$

The Grand Canyon and the Colorado River are beautiful, rugged, and sometimes dangerous. Assume there is a physician at the park clinic in Grand Canyon Village. Suppose the physician has recorded (for a 5-year period) the number of visitor injuries at different landing points for commercial boat trips down the Colorado River in both the Upper and Lower Grand Canyon. Compute a 5% trimmed mean for Upper Canyon and Lower Canyon. Round your answer to the nearest thousandth. Upper Canyon: Number of injuries per Landing Point Between North Canyon and Phantom Ranch $\begin{array} { l l l l l l l l l l l } 4 & 5 & 3 & 3 & 5 & 6 & 7 & 10 & 5 & 3 & 5 \end{array}$
Lower Canyon: Number of injuries per Landing Point Between Bright Angel and Lava Falls
$$\begin{array} { l l l l l l l l l l l l l l } 9 & 3 & 3 & 0 & 7 & 8 & 4 & 12 & 5 & 0 & 3 & 11 & 4 & 3\end{array}$$

A) The 5% trimmed mean for Lower Canyon is 3.333 and for Upper Canyon is 5.417.
B) The 5% trimmed mean for Lower Canyon is 2.727 and for Upper Canyon is 4.643.
C) The 5% trimmed mean for Lower Canyon is 2.636 and for Upper Canyon is 3.786.
D) The 5% trimmed mean for Lower Canyon is 3.222 and for Upper Canyon is 4.333.
E) The 5% trimmed mean for Lower Canyon is 4.333 and for Upper Canyon is 3.222.