$(3)$ A $500c{m}^3$ sample of oil is compressed in a cylinder Until its pressure is increased from $1$ atm to $50$ atm $.$ If the bulk modulus equals $1750$ MPa $,$ find the percent change in volume of the oil.

$(4)$ A $1\mathrm{.}0$ ll force muves a piston Inside a Cylinder at a Velocity of $10f\frac{t}{s},$ as show in fig below, The $4\mathrm{.}0$ in diameter piston is centrally located in the $4\mathrm{.}004$ in Inside diameter cylinder. An vil film separates the piston from the cylinder. Find the absolute viscosity of the oil in units of $16.\frac{s}{f}{t}^2.$