what is the formula to use to find speed, given only distance.

for example look at this problem

a falconer places bird on a perch 1m off the ground. the falconer then walks 6m away and throws a practice target 6m straight up in the air at which it reaches its maximum height and starts to fall

now I have many things to find.

if the falconer is 1.6 m tall, how fast did he initially threw the target in the upright direction?

1. what is the formula to use in here?

2. and what formula to use if the target is falling down and the bird is trying to catch it, how fast must it go to catch it?

Question

what is the formula to use to find speed, given only distance.

for example look at this problem

a falconer places bird on a perch 1m off the ground. the falconer then walks 6m away and throws a practice target 6m straight up in the air at which it reaches its maximum height and starts to fall

now I have many things to find.

if the falconer is 1.6 m tall, how fast did he initially threw the target in the upright direction?

1. what is the formula to use in here?

2. >>> and what formula to use if the target is falling down and the bird is trying to catch it, how fast must it go to catch it?