Consider the following for the next two (2) items that follow :

Let the plane $\frac{2x}{k} + \frac{2y}{3} + \frac{z}{3} = 2 $ pass through the point (2, 3, -6).

What are the direction ratios of the normal to the plane ?

Consider the following for the next two (2) items that follow :

Let the plane $\frac{2x}{k} + \frac{2y}{3} + \frac{z}{3} = 2 $ pass through the point (2, 3, -6).

If p, q and r are the intercepts made by the plane on the coordinate axes respectively, then what is (p + q + r) equal to ?

What is the angle between the two lines having direction ratios (6, 3, 6) and (3, 3, 0)?

If l, m, n are the direction cosines of the line x - 1 = 2(y + 3) = 1 - z, then what is l⁴ + m⁴ + n⁴ equal to?