Exercise 2 solution

(a) Landscape. Wide-angle lens (Chapter 2), small aperture such as f/11 to f/13 for sharpness throughout (Chapters 1 and 3), tripod, sunrise or golden hour light (Chapter 4).
(b) Portrait. About 75 to 135 mm on full frame, a wide aperture, perhaps stopped down a stop or two to keep the face sharp (Chapters 2 and 3); window light, with early morning or late afternoon best, plus a reflector to even out contrast (Chapter 4).
(c) Street. A wide-angle lens such as 35 mm (Chapter 2); a faster shutter speed to freeze movement, so a mode such as shutter priority is sensible (Chapter 6). Be aware of local rules about photographing people.
Exact settings depend on the light; these follow the genre articles' tendencies (check).