Draw the waveform and eye diagram of BPSK and BFSK and from this diagram find the…

In digital communications, an eye diagram is used to visualize
the effect of noise and signal distortion as a result of
transmission over a channel. The eye diagram overlays a sequence of
received pulses. The eye diagram plots the signal levels on the
vertical axis versus the normalized time on the horizontal
axis.

in a BPSK system there are four possible transition states: (i)
from {+1} to {+1}, (ii) from {+1} to {-1}, (iii) from {-1} to {+1},
and (iv) from {-1} to {-1}.

A visualization of these transitions is:

Eye diagram of BPSK:

The opening in the middle is called “eye opening”, which
measures the effect of additive noise on the signal. Namely, if
there is more noise (or symbol interference), the opening will be
narrower.

Eye Diagram of FSK: