college grades...

[Mariogs379]

hey all,
i'm attending a top twenty liberal arts college this fall and am taking the following:
Calc 1 (not worried as I got a 5 on both Calc APs)
freshman english course
intro to philosophy
intro to psychology or ez math course or something else

1/3 of the students at my school have 3.5+
how hard would it be to get these kinda grades?

thanks in advance,
mario