Find fx and fy for f(x, y) = 2x³ + x³y² + 3xy² + y ³ Select one: a. fr = 4x² + 6x²y² + 3y², = 6x² + 3x²y² + 3y², b. fx c. fx - e. fx 6x² + 3x² y² + 6y², d. None of these = 6x² + 6x²y² + 6y², fy = 2x³y + 3xy + 3y². fy = 2x³y + 6xy+3y². fy = 3x³y + 6xy + 3y². fy = 3x³y + 6xy + 3y².

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