To make a histogram of students' grades in a certain class, the teacher groups students as follows: 88 students scored between 00 and 6060 66 students scored between 6060 and 7070 1010 students scored between 7070 and 8080 1414 students scored between 8080 and 9090 1212 students scored between 9090 and 100100 Find the area (as a percentage) of each block in the histogram, then find the height (as percent per point) of each block. (You may round to two places after the decimal.)