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Step 1Determine readioly\begin{array}{l}R_{1}=\text { ? } \\R_{2}=\text { ? }\end{array}\begin{array}{l}R_{1}+R_{2}=1600+\frac{1}{2}(12)(400) \\R_{1}+R_{2}=4000 \mathrm{lb} .\end{array}Step 2Thing Moments about point B ":-\begin{aligned}\sum H_{B}=0 \Rightarrow R_{1}(16) & =(1600)(13)+\frac{1}{2}(400)(12) \frac{1}{3}(12) . \\R_{1} & =1900 \mathrm{lb} . \\R_{2} & =4000+1900 . \\R_{2} & =2100 \mathrm{lb} .\end{aligned} ...