3968：Angry Birds Again

luyi0619 loves playing the popular game – angry bird. You haven’t heard about it? Oh, my god! You are out, I think. The following hyperlink to Wikipedia will help you.

http://en.wikipedia.org/wiki/Angry_Birds

Every day, he spends lot of time playing the game. You know, as time goes, he will be bored. This time, when he hits a pig successfully he wants to calculate the distance that bird covers. As a clever programmer, can you help him to solve the problem?

The gravity acceleration is 9.80 m/s^2.

The first line contains only one integer T (T is about 100) indicates the number of test cases.

For each case there are five integers x0,y0,x1,y1,t;

x0,y0 is the bird’s position.

x1,y1 is the pig’s position.

t is the time that the bird used to cover the distance.

All integers above are non-negative and in the range [0,100]

x0 and x1 are never equal.

One line for each case specifying the distance rounded to three digits. If the pig can’t be hit in the given time, output “Impossible.” without the quotes.