1. Among unipolar NRZ-L, Polar NRZ-L, NRZ-I, and RZ, Manchester, differential Manchester, AMI, and MLT-3, which schemes have no issues on synchronization, baseline wandering, and DC components, respectively?Answer:With self-synchronization problem: unipolar NRZ-L, polar NRZ-L, polar NRZ-I, AMI, MLT-3With baseline problem: unipolar NRZ-L, polar NRZ-L, polar NRZ-IWith DC components problem: unipolar NRZ-L, polar NRZ-L, polar NRZ-IWithout self-synchronization problem: polar RZ, Manchester, differential ManchesterWithout baseline wandering problem: Manchester, differential ManchesterWithout or with very little DC components problem: polar RZ, Manchester, differential Manchester, AMI