This isn't difficult. Where are you stuck? Do you understand what AND and OR do? (Presumably not, otherwise finding the answer would be trivial.)

Truth tables for AND and OR:

AND:

a b x

0 0 0

0 1 0

1 0 0

1 1 1

OR:

a b x

0 0 0

0 1 1

1 0 1

1 1 1

and these operations are performed on every bit. So, taking them right to left, 1 and 1 is 1, 0 and 1 is 0 etc, so the result is xxxxxx01; we then OR that with 11110000 which gives us xxxxxx01. You can fill in the x's now you know what to do.