On the same set of axes sketch each of the following pairs of curves:

(a) y = e^x and y = 3e^x.

(b) y = e^x and y = e^−x.

(c) y = e^x and y = e^(x+2).

(d) y = e^x and y = e^x + 2.

(e) y = e^x and y = x + e^x.

(f) y = e^x and y = e^3x.

(g) y = e^x and y = e^−3x.