In Mrs. Spangler's calculus class, all of the students are also studying one or more foreign languages.
27 students study French
29 students study German
17 students study Mandarin
12 students study German and French
3 students study German and Mandarin
2 students study French and Mandarin
1 student studies French, German, and Mandarin.
a) How many students are in Mrs. Spangler's class?