Question: Write the complete set of formulas for the finite difference discretization of two-dimensional Navier-Stokes equation system for incompressible viscous unsteady flow with zero body forces.

Write the complete set of formulas for the finite difference discretization of two-dimensional Navier-Stokes equation system for incompressible viscous unsteady flow with zero body forces. Use the projection method, simple explicit scheme of the first order for time discretization, and approximation of the second order based on the central differences for spatial discretization. Use a colocated Cartesian uniform grid. Write the discretization that conserves mass exactly.

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