In each of the following questions, two equations numbered I and II are given. You have to solve both the equations and select the appropriate option.
Give answer If
a: x > y
b: x ≤ y
c: x ≥ y
d: x < y
e: Relationship between x and y cannot be established
I.$$x^{2}-x-12= 0$$
II. $$y^{2}+4y+4=0$$
I. $$2x^{2}-15x+27=0$$
II. $$2y^{2}-23y+63=0$$
I. $$x^{2}+11x+28=0$$
II. $$5y^{2}+27y+28=0$$
I.$$x^{2}-11x+30=0$$
II.$$y^{2}-15y+56=0$$
I. $$3x^{2}+16x+21=0$$
II. $$2y^{2}+15y+25=0$$
Study the following graph to answer the given questions.

In which year is the percentage rise in units produced from the preceding year the maximum ?
What is the difference between the number of units exported in 1999 and 2000 ?
What is the average number of units exported over the years ?
In which year is the per cent of units exported to the units produced the maximum?
In which year is the difference between the units produced and exported the maximum ?