Help me pls 10pts + brainliest

What is the value of x in the this question ?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.