1.	\(\left(\dfrac{5}{3}\right) \times 10^{-8}~\text{s}\)	2.	\(\left(\dfrac{5}{2}\right) \times 10^{-11}~\text{s}\)
3.	\(\left(\dfrac{5}{3}\right) \times 10^{-11}~\text{s}\)	4.	\(\left(\dfrac{5}{2}\right)\times 10^{-8}~\text{s}\)

1.	\({\dfrac{\sqrt5}{2}}\)	2.	\({\dfrac{\sqrt3}{4}}\)
3.	\({\dfrac{\sqrt3}{2}}\)	4.	\({\dfrac{\sqrt5}{4}}\)

1.	less than \(\dfrac x4\)
2.	more than \(\dfrac x4\) but less than \(\dfrac x2\)
3.	\(\dfrac x2\)
4.	\(\dfrac x4\)

1.	\(i=i'\)	2.	\(i>i'\)
3.	\(i<i'\)	4.	\(i=0\)

1.	\(9^\circ\)	2.	\(10^\circ\)
3.	\(4^\circ\)	4.	\(6^\circ\)