Some scholars have argued that there is no coherent basis for treating tribes as ‘pristine’ – i.e., original or pure – societies uncontaminated by civilization. The idea that tribes are like stone age hunting and gathering societies that have remained untouched by time is still common, even though this has not been true for a long time. Based on the above passage, justify with four reasons why this idea of tribes having remained untouched is untrue.

Study the chemical structure of an addictive drug shown below and answer the questions that follow.
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 \(P,O,Q\).