Find the four second-order partial derivatives. f left parenthesis x comma y right parenthesisequals3 x cubed y minus 2 xy plus 8 y Question content area bottom Part 1 f Subscript xx Baseline left parenthesis x comma y right parenthesisequals enter your response here Part 2 f Subscript xy Baseline left parenthesis x comma y right parenthesisequals enter your response here Part 3 f Subscript yx Baseline left parenthesis x comma y right parenthesisequals enter your response here Part 4 f Subscript yy Baseline left parenthesis x comma y right parenthesisequals enter your response here