Final answer:
To sketch the waveform corresponding to the 4-bit sequence in OOK, use a time axis labeled t/T and represent each bit as 'on' or 'off' based on its value.
Step-by-step explanation:
To sketch the waveform corresponding to the 4-bit sequence {Bₖ} obtained from the BCD representation of the last digit D₁ of your student ID number in an OOK (on-off keying) low-rate wireless link, you need to understand how OOK works. In OOK, the signal is either on or off, representing binary 1 or 0. The signal is on during the duration of a '1' bit and off during the duration of a '0' bit.
To sketch the waveform, you can use a time axis labeled t/T, where t is the current time and T is the duration of one bit. For example, if T is 1 second, each bit would last for 1 second. You can plot the signal as a square wave, where the signal is 'on' during the duration of a '1' bit and 'off' during the duration of a '0' bit.
Since the question specifies to use a normalized time axis, the exact duration of each bit may not be specified. But you can still represent the waveform accurately by showing the transitions between 'on' and 'off' states at the appropriate times.