Find the general solution of the given differential equation, or solve the given initial value problem. 1. [2 pts] 2y = 1-3y. 2. [2 pts] 3y'-y + 5 = 0, y(0) = 3. 3. [2 pts] y + 2y + 1 = te-2t. 4. [2 pts] 2ty' - y = t - 2t+1, y(1) = 3, t > 0.