1
C
2
C
3
C
4
D
5
A
6
A
7
C
8
B
9
C
10
D
11
C
12
B
13
A
14
B
15
A
16
B
17
C
18
C
19
A
20
A
PhysicsAndMathsTutor.com
21
A
22
B
23
C
24
C
25
A
26
C
27
A
PhysicsAndMathsTutor.com