Answer:
The velocity is

Henrietta is at distance
from the under the window
Step-by-step explanation:
From the question we are told that
The speed of Henrietta is

The height of the window from the ground is

Generally the time taken for the lunch to reach the ground assuming it fell directly under the window is

=>
=>
Generally the time taken for the lunch to reach Henrietta is mathematically represented as

Here
is the time duration that elapsed after Henrietta has passed below the window the value is given as 4 s
Now
=>
Generally the distance covered by Henrietta before catching her lunch is

=>

=>

Generally the speed with which Bruce threw her lunch is mathematically represented as

