25. Which of the following could be a solution to the differential equation y' + 4y = 0? a. y = ear b. y = 2x2 C. y = ArtI d. y = edr e. None of the above 26. Which of the following could be a solution to the differential equation y' + 4y = 0? a. y = edx b. y = edx C. y = ArtI d. y = e2x? e. None of the above 27. Which of the following could be a solution to the differential equation y' - 4y = 0? a. y =e-4x b. y= er C. y = ArtI d. y = e2x? e. None of the above 28. Which of the following could be a solution to the differential equation y' - Ary = 0? a. y =e-4x b. y = edx C. y = ArtI d. y = e2x3 e. None of the above 29. Which of the following could be a solution to the differential equation y' - 4x = 0? a. y = e2x b. y = 4r c. y = sin(2x) d. y = 2x2 e. None of the above 30. Which of the following could be a solution to the differential equation y' - 4 = 0? a. y= e2x b. y = 4r c. y = sin(2x) d. y = 2x2 e. None of the above