$2$a$)$ A pipe goes from having a diameter of $4\mathrm{.}0$ cm to a diameter of $8\mathrm{.}5$ cm$.$ Assuming

the fluid is water and the pipe is aligned horizontally, determine the velocity of the water

in the wider section, if the speed of the water in the narrow section is $8\mathrm{.}5$ m$/$s$.$

b$)$ If the pressure in the narrower tube is $125,000$ Pa$,$ determine the pressure in the wider

pipe