Exercise: Forward Difference Case

The pressure$-$viscosity relationship of a given gas is given as:

$\backslash$table$[[P,,400,800,1200,1600,2000,2400],[,cp,0\mathrm{.}0117,0\mathrm{.}0125,0\mathrm{.}0132,0\mathrm{.}0146,0\mathrm{.}0163,0\mathrm{.}0180]]$

a$)$ Using the data, prepare a forward difference table

b$)$ Using a second degree polynomial that satisfies the constraints at $400,800,$ and $1200$ psi, calculate the viscosity at $1000$ psi and the error

please ensure the solving is in detail for me to understand