Would someone be willing to help me solve this and explain how they arrived at their answer?

Consider the following regular expressions (dot operator omitted) R1 = (01) * (0*1*) (10) R2 = (101) * (01)* R3 = (10) (01*) * (01) R4 = 10 (R2*)| R3 Q2. Which of the following is true? a. 10 E L (R1) b. 10 E L (R1) c. 010 E L (R1) d. 010 L (R1) and 101 E L (R2) and 1000 E L (R2) and 100 E L (R2) and 100 L (R2)