3.Construct DAG for the following:

a+a*(b-c)+(b-c)*d

i=i+10

((x+y)-((x+y)*(x-y)))+((x+y)*(x-y))

4. Generate the intermediate code for:

i ) if (x<10 || x>20 && x!=y) x=0;

ii) while a

if c

else x:=y-z