(a) A straight line passes through the points (2, 4) and (1, 1).

(i) Calculate the gradient of the line.

(ii) Find the equation of the line.

(iii) Find the x-intercept of the line.

(b) Does the point (2, 2) lie on the line considered in part (a)? Explain your answer.

(c) Find the coordinates of the point where the lines with the following equations intersect:

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