Brendan Is a Practitioner Is Working with an Adult Client

Brendan is a practitioner is working with an adult client to drink less caffeine each day. Brendan would like to arrange an experimental evaluation to investigate the effects of a reinforcement procedure on his client's caffeine consumption. Describe which single baseline within-subject design would be most appropriate for this experimental question and discuss
a) the features of the design you chose and
b) considerations Brendan should make specific to your chosen design.