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Answer the questions below.

1. If the measures of arcs a and b are 50° and 60°, respectively, then the measure of angle 3 is.
2. If the measure of angle 4 is 40° and the measure of arc a is 30°, then the measure of arc b is.

3. If the measures of arcs a and b are 48° and 60°, respectively, then the measure of angle 4 is.

4.If the measure of angle 3 is 50° and the measure of arc a is 48°, then the measure of arc b is.

5. If the measure of arc a is half the measure of arc b and the measure of angle 4 is 78°, then the measure of arc a is and the measure of arc b is.