Answer these two math questions please?

If triangle ABC, if A=102 degrees, a=5, and b=2, find C to the nearest degree.

a.23 degrees

b. 55 degrees

c. 62 degrees

d. no exist

2. The radius of a circle is 3.6 cm. The length of the arc of the cirlce cut by a central angle is 8.4 cm. Find the measurement of the central angle,

a.2.3 degrees

b.124.1 degrees

c. 133.7 degrees

d.172.8 degrees