The polynomial 3xy⁴+2xy³+7y²−19 is a polynomial in two variables x and y. Find the number of terms and constant terms.
a) Number of terms: 4, Constant term: -19
b) Number of terms: 4, Constant term: 7
c) Number of terms: 3, Constant term: -19
d) Number of terms: 3, Constant term: 7
