Part 1. If the message portion of a frame contains 640 bits, SDLC has a beginning flag (8 bits), an address (8 bits), a control field (8 bits), a frame check sequence (assume we use a CRC-32 with 32 bits), and an ending flag (8 bits). Calculate the efficiency of this synchronous transmission and complete TE1. Next, calculate the efficiency using a frame that contains 720 bits with the same overhead and complete TE2. Which one is more efficient? Part 2: Explain why. (One short paragraph 50 words or less)