Often it simplifies the description of Turing machines and LBA if one allows storing several characters of

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Often it simplifies the description of Turing machines and LBA if one allows storing several characters of the working alphabet in each cell of the tape. There is only one read head, but the tape is divided into several tracks, which can have can all have different content. Thus, if we have ???? tracks. each step ???? characters can be read/written. This form of TM/LBA is also called multitrack or multitrack TM/LBA (MT-TM and MT-LBA, respectively).
Show that MT-TM/LBA is equivalent to normal TM/LBA.