c$.$This part provides you with an opportunity to demonstrate your understanding of the problem$-$solving approach taught in TM$112$ and Python functions. Decomposition and algorithms are covered in Block $1$ Parts $2$ and $4$ and Block $2$ Part $2.$ Further examples can be found in Block $2$ Part $4.$ How to define your own functions is introduced in Block $2$ Part $4$ Section $4\mathrm{.}1\mathrm{.}3.$