<image>A certain grade of students in an elementary school underwent a physical fitness test. The school sampled some students' one-minute jump rope test results and created a statistical chart based on these results. Student A calculated that the sum of the frequencies of the first two groups is 0.12. Student B calculated that the frequency of the first group is 0.04. Student C calculated that the frequency ratio of the second, third, and fourth groups from left to right is 4:17:15. Based on the statistical chart, answer the following questions:

(1) How many students' one-minute jump rope test results were sampled?
(2) Find the frequency of the first and third groups;
(3) If a jump rope count of 130 or more is considered excellent, what is the excellence rate of this test?
(4) If the median of the test results is 120 jumps, then there are at least ______ students with a score of 120 jumps in this test. (Directly provide the answer)