What Is the Pressure Difference When Wind Speed Is 6 m/s?

[Apprentice123]

Admit Wed to speed the flow of air above the rear door of the cave is equal to 1,07Vo. Calculate the pressure difference p(1) - p(2) when the wind speed in the flat surface is equal to 6 m/s.

Answer:
3,21 N/m^2

figure:
http://www.physicshelpforum.com/physics-help/attachments/advanced-mechanics/434d1253986504-pressure-3.14.jpg

 

[Apprentice123]

Admit Wed to speed the flow of air above the rear door of the cave is equal to 1,07Vo. Calculate the pressure difference p(1) - p(2) when the wind speed in the flat surface is equal to 6 m/s.

Answer:
3,21 N/m^2

figure:
http://www.physicshelpforum.com/physics-help/attachments/advanced-mechanics/434d1253986504-pressure-3.14.jpg

My attempt:

Bernoulli:

Z1 + P1/y + V1^2/2g = Z2 + P2/y + V2^2/2g

I have:
V1 and V2. But I do not have Z1 and Z2