Give counter examples or reasons why the following statements are false: b) If L1CL2 and L2 is not regular, then L1 is not regular. c) If L1 and L2 are not regular, then LUL2 is non-regular. d) If L1 and L2 are not regular, then LnL2 is non-regular e) If L1 is regular and L2 is not regular, then LUL2 is not regular