From given bar graph answer the following questions by looking at number of books on different-different subjects in library

Width of Bars are same and equal distances are kept between two consecutive bars.
Here, Length of bar represents- number of corresponding data
(i) Which subject has maximum number of books and how many?
(ii) Which subject has least number of books and how many?
(iii) How many books are there in the library?
(iv) What information has been given by this bar graph?
(v) Difference in the number of books of which two subjects is minimum?