I just need someone to help me get started with this.

Let f:[a,b] -> R (reals) be Riemann Integrable over [a,b] and let alpha be in the real numbers. Define f_alpha : [a + alpha, b + alpha] -> R (reals) by

f_alpha = f(x-alpha). Show that f_alpha is Riemann Integrable and Riemann Integrable of f_alpha(x) dx from a+alpha to b+alpha is equal to the Riemann Integral of f(x) dx from a to b.

Sorry about how it looks...not really sure how to put in all the fancy symbols. There are three ways so far that I can start using, but I'm not really sure on how to actually use them. So, I can use the definition of Riemann Integrable outright, I could use the definition of the Riemann Condition, or I could try to prove it is Darboux Integral and from the Equivalence Theorem it would be Riemann Integrable. But I have no idea how to start. Any help would be awesome.