Sketch the following curves and indicate clearly the points of intersection with the axes:

a. y = (x – 3)(x – 2)(x + 1) 

b. y = (x – 1)(x + 2)(x + 3)

c. y = (x + 1)(x + 2)(x + 3) 

d. y = (x + 1)(1 – x)(x + 3)

e. y = (x – 2)(x – 3)(4 – x) 

f. y = x(x – 2)(x + 1)

g. y = x(x + 1)(x – 1) 

h. y = x(x + 1)(1 – x)

i. y = (x – 2)(2x – 1)(2x + 1) 

j. y = x(2x – 1)(x + 3)