Please solve in details with no matlab or python only by hand

Use the following data to find the velocity $(v=d\frac{x}{d}t)$ and acceleration

$(a=d^2\frac{x}{d}{t}^2)$ at $t=4$ seconds.

a$)$ use second order forward finite difference methods

b$)$ use second order backward finite difference methods

c$)$ use first order centered finite difference methods