Answer:
value of a is 1/5 and b=1/11
To be honest none of the answers is correct
There are infinite irrational numbers between 4 and 9 because an irrational number can be any value as long the number cannot be expressed as a ratio between two whole numbers. The mistake is limiting irrational numbers to the common irrational numbers we know such as π and e.
The answer is anything that adds up to 7.
Examples: (5 + 2) or (3 + 4)