In a certain school, there are 180 pupils in Year 7. One hundred and ten pupils study
French, 88 studies German and 65 studies Indonesian. Forty pupils study both French and
German, 38 studies German and Indonesian and 26 studies both French and Indonesian,
while 19 study German only. Find the number of pupils who study:
a) All three languages
b) Indonesian only
c) None of the languages
d) At least one languages
e) Either one or two of the language.