Find the value of limit as x approaches a of 5 square root of (f(x)/g(x) + h(x)), if limit as x approaches a of f(x) = 1, limit as x approaches a of g(x) = 2, and limit as x approaches a of h(x) = 7. Select one:
1) 5/3
2) 25/3
3) 5/9
4) 25/9