Computing the checksum $(2+2=4$ points$).$ In this problem, we will get practice with computing the checksum according to the algorithm used by TCP and UDP. The checksum is the one$$s complement of the one$$s complement sum of a sequence of data values. We will use the same algorithm as covered in lecture to compute the TCP$/$UDP checksum, but do so over a sequence of $4-$bit chunks rather than $16-$bit chunks.

a$.$ Consider the following data bits. What is the $(4-$bit$)$ checksum of this $(8-$bit$)$ data? $(2$ points$)$

$01011100$

b$.$ Consider the following data bits. What is the $4-$bit checksum of this $(12-$bit$)$ data? $($Note: you can reuse calculations from part $($a$).)(2$ points$)$

$010111001001$