Pdf and Cdf of a Random Process

Question

A random process increases linearly with time: Y(t) = at + X, where a is a constant and X is uniformly distributed on [−1, 1]. I appreciate it if you can help me how I can find cdf and pdf of the random process of Y(t) for = R+. I also need to find the mean, variance, autocorrelation function, and autocovariance function for Y(t).