(a)
(ii) and (iv) are discrete.
Discrete data are countable; (ii) family members and (iv) heights to nearest cm take specific values.
Result: (ii) and (iv) [2]

(b)
(i) Median = 10
(ii) \( Q_3 = 12 \)
(iii) Minimum value = 1 (±0.2)
Read boxplot values: median (central line), upper quartile (upper box edge), minimum (lower whisker).
Result: Median = 10, \( Q_3 = 12 \), Minimum = 1 [3]

(c)
9, 10, 11
Use mean formula: \( \frac{a + b + c}{3} = 10 \), so \( a + b + c = 30 \).
Step: \( 9 + 10 + 11 = 30 \), \( \frac{30}{3} = 10 \).
Result: 9, 10, 11 [1]