A sample of University students who were asked how much they spent on their semester projects. One semester project Cost ($) Number of Students
15-24 31
25-34 45
35-44 19
45-54 81
55-64 70
65-74 29

Table 2

Find the following from given Table 2
i) Arithmetic Mean ii) Median Cost iii) Q1 & D4 iv) 25th & 46th Percentile