65 students in a calculus class are polled on their major. The only majors students listed were engineering, math, and e

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65 students in a calculus class are polled on their major. The
only majors students listed were engineering,
math, and economics. There are 40 single majors, 8 double majors
(only one of whom is majoring in
economics), 4 triple majors. 37 of the students are majoring in
math, 48 of the students are not majoring in
economics, and 32 of them are majoring in math but not economics.
Determine exactly how many students
have each possible combination of single and double majors, and how
many students have not declared a
major.