2. To understand the rural economic situation in a certain area, a sampling survey was conducted on the annual household income of farmers. The survey data on farmers' annual household income was organized into the following frequency distribution histogram. Based on this frequency distribution histogram, which of the following conclusions is incorrect?

A. The estimated proportion of farmers with annual household income below 4.5 ten thousand yuan is 60\%

B. The estimated proportion of farmers with annual household income not less than 10.5 ten thousand yuan is 10\%\\
\includegraphics[max width=\textwidth, alt={}, center]{bf05167e-5a98-4047-93b2-e56d7d5bb0b7-1_331_625_452_691}\\
C. The estimated average annual household income of farmers in this area does not exceed 6.5 ten thousand yuan\\
D. It is estimated that more than half of the farmers have annual household income between 4.5 and 8.5 ten thousand yuan\\