PLEASE EXPLAIN PART 3 TO THE QUESTION (ANSWER IS 5.6). IM TRYING TO UNDERSTAND HOW WE GET 5.6. I POSTED THIS QUESTION BEFORE AND THE PERSON COPIED AN EXISTING POST. PLEASE DONT DO THAT.

Question 2b : (6 marks) Barrel Needle A hypodermic syringe contains a medicine with the density of water. The barrel of the syringe has a radius r1=1.0cm and the needle has a radius of 4.0mm. In the absence of a force on the plunger, the pressure everywhere is 1.0atm. A force F of 5.0N is applied to the plunger. i) What is the pressure in the barrel? ii) If the velocity of the fluid in the barrel is v1, write an expression for the velocity of the fluid in the needle, v2, in terms of v1. iii) Use Bernouili's equation to determine the speed of the medicine as it leaves the tip of the needle