\[
\begin{aligned}
\text{MYR}
&= \frac{P \times r}{1-(1+r)^{-n}}\\
&= \frac{50{,}000 \times 0.0877}{1-(1.0877)^{-7}}\\
&= 9{,}857.984869\ldots
\end{aligned}
\]

**Minimum yearly repayment: \$9,857.98**

The controlling authority is **subsection 109E(6) of the Income Tax Assessment Act 1936 (Cth)**.