$5.$ Bar $\backslash ($ A B $\backslash )$ is supported by a pinned support at $\backslash ($ A $\backslash )$ and link $\backslash ($ B D $\backslash ).$ Determine the reactions at $\backslash ($ A $\backslash )$ and the force applied by link $\backslash ($ B D $\backslash )$ required to keep bar $\backslash ($ A B $\backslash )$ in equilibrium.

$($Hint: You should draw a FBD of bar AB$.)$

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