Number Of Conflict Serializable Schedule


#1

find total number of conflict serializable for

T1=R1(A)W1(A)R1(B)W1(B)R1©W1©

T2=R2(A)W2(A)R2(B)W2(B)R2©W2©.

source : ( part 2 )

( i am not able to catch these solutions )

tried this method :

this way :

Will somebody help me to solve this using the same method used in above image ? ( the image from the last link given in comment)
Thank you !