Using the Banker's rule, nd the amount of simple interest

$($a$)$ on $K12,000$ from $2^{nd}$ November $2022$ to ${16}^{th}$ July $2023$ at $5\mathrm{.}5\%.$

$($b$)$ on $K80,000$ from ${20}^{th}$ April $2023$ to ${26}^{th}$ August $2024$ at $12\mathrm{.}75\%.$

$($c$)$ on $K25,000$ from ${13}^{th}$ September $2021$ to $1^{st}$ June $2022$ at $18\mathrm{.}08\%,$

$($d$)$ on $K20,000$ from $2^{nd}$ November $2019$ to $7^{th}$ July $2022$ at $13\%.$

Find the difference in simple interest on a $K50,000$ loan at a simple interest rate of $11\%$ from $8^{th}$ August $2024$ to ${15}^{th}$ February $2025$ next year, using the exact time$/$ordinary interest and exact time$/$ exact interest.