Answer:
1. 
2. 
3. 
4. α = 59.05°
5. 
6. α = 59.05°
Explanation:
The position of the center of mass 1s before the collision is:

where
;
;
;
;
Replacing these values:


where
;
;
;
;
Replacing these values:

The velocity of their center of mass is:

where
;
;
;
;
Replacing these values:


where
;
;
;
;
Replacing these values:

So, the magnitude of the velocity is:


The angle of the velocity is:


Since on any collision, the velocity of the center of mass is preserved, then the velocity after the collision is the same as the previously calculated value of 16.66m/s at 59.0° due north of east
Explanation:
C . frequency
is the correct answer I think .
100/2.5 because power=energy/time