2. For each of the following sets, sketch EO, E, and 8E.

(a) E={(x,y):x2+4y2:::;1}.

(b) E = {(x,y): x2 - 2X+y2 = O} u {(x,O): x E [2,3]}.

( c ) E = {( x, y) : y 2: x 2, 0 :::; y < I}.

(d) E={(x,y):x2-y2<1, -l