The average score on the first Calculus test is 78%. The standard deviation is 8%. 20 students took the test. The average score on the second test was 82%, but only 16 students took this test.

1. For the first test: What percentage of the students would you expect to have scored above 94%?
2. For the first test: What percentage of the students would you expect to have scored below 70%?
3. What is the weighted average score across both test?