Define disguised unemployment. State its implications on output and employment in a country.
Definition: Disguised unemployment refers to a situation where more people are employed than required, resulting in zero or negligible marginal productivity.
Implications: Inefficient Labor Use: Resources are underutilized, leading to lower productivity.
Stagnant Economic Growth: Excess labor in low-productive sectors like agriculture fails to contribute effectively to GDP.
A racing track is built around an elliptical ground whose equation is given by \[ 9x^2 + 16y^2 = 144 \] The width of the track is \(3\) m as shown. Based on the given information answer the following: 
(i) Express \(y\) as a function of \(x\) from the given equation of ellipse.
(ii) Integrate the function obtained in (i) with respect to \(x\).
(iii)(a) Find the area of the region enclosed within the elliptical ground excluding the track using integration.
OR
(iii)(b) Write the coordinates of the points \(P\) and \(Q\) where the outer edge of the track cuts \(x\)-axis and \(y\)-axis in first quadrant and find the area of triangle formed by points \(P,O,Q\).