A) Name the phenomena labelled A and B. b) Name the parts labelled I, II, III, IV, and V. c) Measure and record the angles labelled i, r, a and b.

Here's the solution to question 3:

a) Name each of the phenomena labelled A and B.
A. Refraction
B. Reflection

b) Name each of the parts labelled I, II, III, IV and V.
I. Incident ray
II. Refracted ray
III. Normal
IV. Reflected ray
V. Mirror (or Reflecting surface)

c) Measure and record each of the angles labelled $i$, $r$, $a$ and $b$.
(Measurements are approximate based on visual estimation from the image.)
$i = \boxed{45^\circ}$
$r = \boxed{30^\circ}$
$a = \boxed{30^\circ}$
$b = \boxed{30^\circ}$