Three questions...do they have right answers?

THINK ABOUT THREE QUESTIONS

In reality, there are three questions that every one frequently asks, where did we come from or who creates us? Why are we in this world? And then where will we go after we die?
Actually, these questions are asked by instinct of human being, and we often hear these questions from children asking their parents. In fact, what ever religion or believes that we embraced, these questions are determining our identity, that who we are? Muslims, Christians, Jews, Atheists,...etc.
There are some philosophers who do believe that answering these questions logically guarantee our real happiness in our lives or even in our lives after death (for people who believe the life after life).