Hi everyone, I need your help. I am getting trouble in two differential Equation.

The first one:

How can I solve the family of Differential Equation y' = -y*(y-6)^2 - a ? I want to sketch the bifurcation diagram, and what value can “a” be? THX.

The second one:

A DE y' = (1/t)*(2*y + 1). Does there exist a unique solution that satisfies y(-1) = 0? If so, find it. If not, find all solutions and explain why this does not contradict the uniqueness Theorem. How to solve it? Plz.

I am now waiting the answers online. Thx.