\f22. Which of the following can ONLY be differentiated through Implicit Differentiation? A. 1 = x+y C. x2 - 3y3 +xy = x+y B. 15x2 = 10x4 - 5x3 +5y D.y = x44. The sum of two numbers is 28. If x is one of the numbers and P is the product of the numbers, which of the following functions represents the value of P in terms of x? A. P(x) = 28x - x2 C. P(x) = x2 - 28x B. P(x) = 28 - x2 D. P(x) = 28x + x2