The table shows the weekly profit In Naira from a mini-market. Weekly: 1-10 11-20 21-30 31-40 41-50 51-60 profit(#) Frequency: 6 6 12 11 10 5 (a)Draw the cumulative frequency graph of the data. (b)From your graph,estimate the: (i)Median; (ii) 80th percentile. (c)What is the modal weekly profit?​