Explain how the progressive mode in JPEG compression standard can be achieved (6 Marks) In generic video encoding, motion vectors are transmitted in inter (P/B) frames. However, motion vectors can also be transmitted in intra (I) frames for error concealment purpose. Describe how these motion vectors might be used for error concealment if transmission errors occur. (6 Marks) For the open Group of Pictures (GOP) structure starting with a B frame as in the following display order, determine the encoding order of the GOP. How would the open GOP concept affect decoding in case a GOP is lost due to transmission errors