In the figure above, which number refers to the midtones level?

In the binary search routine in the text, the first thing the code does is to check whether the object is not in the array. What is the test for this condition?

a) first < last b) first == last c) first > last d) the test does not involve the variables first and last.

You can construct Activities using ____________________ layout files and a Java class.

Fill in the blank(s) with the appropriate word(s).