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1 1 10 Which of the following is an equilibrium solution? (a) y = -1 [ Select ] (b) x = 0 [ Select ] (c) y = 3 [ Select ] (d) y = x [ Select ]Question 4 4 pts Which of the following are separable differential equations? o y' = sec(y) + tan(y) o y' = (x2 +4)(3y - 2) o y'= xy+ 3x - 2y -6. y' = sin(x) - cos(y) O y' = 623 + 4x