Complete Question
The complete question is shown on the first uploaded image
Answer:
a
b

c

Explanation:
Considering the first question
From the question we are told that
The force produced is 
The duration of the punch is 
Generally the impulse delivered is mathematically represented as

=> 
=>
Considering the second question
The approaching velocity of the ball is 
The leaving velocity of the ball is 
The mass of the ball is 
Generally the magnitude of the impulse delivered is mathematically represented as

=> ![I_1 = [0.145 * 45] - [0.145 * -53]](https://tex.z-dn.net/?f=I_1%20%3D%20%20%5B0.145%20%2A%20%2045%5D%20%20-%20%5B0.145%20%2A%20-53%5D)
=> 
Considering the third question
The duration of the impact of the bat is 
Generally the average force exerted by the bat is mathematically represented as

=> 
=> 