Question 1 - A-Level Maths

(a) Find the value of $\frac { \mathrm { d } y } { \mathrm {~d} x }$ at the point where $x = 2$ on the curve with equation

$$y = x ^ { 2 } \sqrt { } ( 5 x - 1 )$$ (b) Differentiate $\frac { \sin 2 x } { x ^ { 2 } }$ with respect to $x$.