Uniform convergence

Let $f_n(x) = \frac{n x}{1 + n^2x^2}$ on $[0, 1]$. (a) Find the pointwise limit. (b) Is the convergence uniform on $[0, 1]$? On $[\delta, 1]$ for $\delta > 0$? (c) Does $\int_0^1f_n\to0$?