The following data gives the amount of manure (in thousand tonnes) manufactured by a company during some  years: year  1992     1993   1994     1995     1996      1997 Manure (in thousand tonnes)   15      35     45  30     40   20 (i)  Represent the above data with the help of a bar graph. (ii) Indicate with the help of the bar graph the year in which the amount of manufactured by the company was maximum. (iii)   Choose the correct alternative: The consecutive years during which there was maximum decrease in manure production are: (a 1994 and 1995   (b) 1992 and 1993(c) 1996 and 1997   (d)    1995 and 1996