Time alloted for the preparation of an examination by some students is shown in the table. Draw a histogram to show the information.

The table below shows the yield of jowar per acre. Show the data by histogram.

In the following table, the investment made by 210 families is shown. Present it in the form of a histogram.

Observe the following frequency polygon and write the answers of the questions below it.

(1) Which class has the maximum number of students?

(2) Write the classes having zero frequency.

(3) What is the class-mark of the class, having frequency of 50 students?

(4) Write the lower and upper class limits of the class whose class mark is 85.

(5) How many students are in the class 80-90?

Show the following data by a frequency polygon.