1. Given that  a</p><p style="line-height: 1.7" class="text-lg tracking-wide font-normal leading-relaxed">a mode of 7 a median of 8.5 a mean of 9</p><p style="line-height: 1.7" class="text-lg tracking-wide font-normal leading-relaxed">Work out the value of a, the value of b and the value of \(c.

$\begin{matrix}a & = & ..................\\b & = & ..................\\c & = & ..................\end{matrix}$