What is being done by the following TM$?$

Note that B stands for blank symbol.

$($a$)$

Adding $1$ to a binary number.

Converting all $1s$ to $0$ s and all $0s$ to $1s.$

Converting all $0$ s to $1s$ and all $1s$ to $0s.$

Computing two's complement of a binary number.

Subtracting $1$ from a binary number.

Clear answer