need help with this

For the univariate continuous case, areas under the pdf over an interval correspond to O dense pdfs O probabilities O none of the above O nondense pdfsfor the bivariate pdf f(y1, y2), volumes under this surface correspond to O probabilities 0 none of the above 0 questions 0 answers In order to find the marginal pdf f(y1) and f(y2) for Y1 and Y2 in the continuous case, you need to O multiply O differentiate O integrate O sum