Question: When a UE moves from a 5G Network to an E-UTRAN, how are the lower 2 bits of the 5GS `<AMF Set ID>` mapped to the E-UTRAN `<MME Code>` during the 5G-GUTI to GUTI mapping process?
Option 1: Bit 1 and Bit 0 of `<AMF Set ID>` map to Bit 3 and Bit 2 of `<MME Code>`
Option 2: Bit 1 and Bit 0 of `<AMF Set ID>` map to Bit 7 and Bit 6 of `<MME Code>`
Option 3: Bit 1 and Bit 0 of `<AMF Set ID>` are not mapped to `<MME Code>`, but to `<MME Group ID>`
Option 4: Bit 1 and Bit 0 of `<AMF Set ID>` map to Bit 5 and Bit 4 of `<MME Code>`
Explanation: During the mapping from 5G-GUTI to GUTI when transitioning from a 5GS to an E-UTRAN, the lower 2 bits of the 5GS `<AMF Set ID>` are mapped into bit 7 and bit 6 of the E-UTRAN `<MME Code>`. This ensures continuity and correct identification within the new network, highlighting the importance of accurate bit-level translations in telecommunications handovers.