Problem $1$:

For each of the two configurations shown in $($a$)$ and $($b$)$:

I. identify the modulation scheme $($out of the three schemes BASK, BFSK$,$ BPSK$)$ used by the particular configuration. Explain your answer.

II$.$ determine the associated bit stream if $($a$)$ sends $8$ bits and $($b$)$ sends $7$ bits, respectively. Explain your answer. Answer the second configuration