Ankita87077 I’m getting ans as 10 vertices and 12 edges. I started from T7 and then going backwards upto T1. final equation will be T7=a+a+a+b+d+c+c. Now draw dag for this , you will get 10 vertices and 12 edges. Sorry I tried but not able to add pictures.
The answer will be minimum 10 nodes and 12 edges. The 3-address code order has to be maintained while elimination terms.