Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Paper format. Professional Engineers of Ontario, Annual Examinations — December 2016, 07-Elec-B3 Digital Communication Systems. Three hours, closed book; a PEO-approved non-programmable calculator (Casio or Sharp approved model) is permitted. Five questions of 25 marks each are printed; any four constitute a complete paper worth 100 marks, and only the first four appearing in the answer book are marked. All five questions are solved here, because the set is a study resource rather than a marked script. Note 1 of the cover page invites the candidate to state any assumption made where a question is open to interpretation — that licence is used explicitly in Question 1.
Reference texts.