There can be like a where a b and c
        
             
        
        
        
D cause that’s the answer
        
             
        
        
        
a)  has CDF
 has CDF


where the last equality follows from independence of  . In terms of the distribution and density functions of
. In terms of the distribution and density functions of  , this is
, this is

Then the density is obtained by differentiating with respect to  ,
,

b)  can be computed in the same way; it has CDF
 can be computed in the same way; it has CDF


Differentiating gives the associated PDF,

Assuming  and
 and  , we have
, we have


and


I wouldn't worry about evaluating this integral any further unless you know about the Bessel functions.
 
        
             
        
        
        
Answer:
32
Step-by-step explanation: