TASK Four $(100$ Marks with $25\%$ weight of the CW overall mark$)$

The zoning method is a traditional approach employed in property valuation. This method is specifically designed for assessing retail premises by measuring, calculating, and comparing their values.

The layout below shows the details of a retail block located in Ghala Industrial Area. This block consists of three units with different dimensions as shown in the layout. Unit #$1$ has recently been let for OMR $10,000$ per annum whereas Unit # $3$ has recently been sold for OMR $100,000.$ You are asked to assess the rent and the sale price on the adjoining units.

Explain the valuation method used and the steps for your calculations.