5. The following two-way table shows the number of students who voted for each of the two candidates for class president, by grade. Candidate Grade 7 Grade 8 Grade 9 Zoe 45 20 65 Alessandro 30 60 90 Total 75 80 155 How many more 8th graders voted for Alessandro than Zoe? 0 15 0 20 O 40 80 1 2 3 4