2D Projectile fire velocity

Hello,

I have a 2D game where 2 GameObjects are approaching to each other.

I want to calculate the velocity with which the 1st GameObject should fire a projectile so that it hits the 2nd GameObject.
The following things are known:

• Velocity of both the GameObjects(with which they are moving)
• Distance between the GameObjects
• Angle of firing trajectory is fixed i.e. 60 degree

Please help me in figuring out the velocity

Let me know if anything else is required.