Answer:
The volume of  required is:- 3.75 mL
 required is:- 3.75 mL
Explanation:
At constant pressure and temperature, the volume of the gases can be used for stoichiometric calculations in terms of moles.
Thus, For the given reaction:-

4 mL of  is required to react with 5 mL of
 is required to react with 5 mL of 
Also, 
1 mL of  is required to react with 5/4 mL of
 is required to react with 5/4 mL of 
So, 
3.00 mL of  is required to react with
 is required to react with  mL of
 mL of 
<u>The volume of  required is:- 3.75 mL</u>
 required is:- 3.75 mL</u>