Find the general solutions to the following differential equations using the separation of variables or the reverse

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Question:

Find the general solutions to the following differential equations using the separation of variables or the reverse product rule. Give a reason as to why you used the method you chose over the other.
(a) dy/dt = 2y − t
(b) dy/dt = − y t + 2
(c) dy/dt = y sin t
(d) dy/dt = cost