(a) Copy and complete the table of values for the relation \(y = 3x^{2} - 5x - 7\).

x	-3	-2	-1	0	1	2	3	4
y	35			-7	-9		5

(b) Using scales of 2 cm to 1 unit on the x- axis and 2 cm to 5 units on the y- axis, draw the graph of \(y = 3x^{2} - 5x - 7, -3 \leq x \leq 4\).

(c) From the graph : (i) find the roots of the equation \(3x^{2} - 5x - 7 = 0\) ; (ii) estimate the minimum value of y ; (iii) calculate the gradient of the curve at the point x = 2.