In Whittaker's classification system,which kingdom acts as the primary producer?

From the following statements,select the wrong one:

If $\alpha, \beta, \gamma$ are the roots of $2x^3 - 2x - 1 = 0$,then $(\Sigma \alpha \beta)^2$ is equal to

If the angle $2 \theta$ is acute,then the acute angle between the pair of straight lines $x^2(\cos \theta - \sin \theta) + 2xy \cos \theta + y^2(\cos \theta + \sin \theta) = 0$ is:

Which one of the following statements is not correct?

The area (in sq unit) of the region bounded by the curves $2x = y^2 - 1$ and $x = 0$ is