Should include a well labeled diagram Standard form equation Sigfig and units

The drawing shows sodium and Sodium ion chloride ions positioned at the Chloride ion corners of a cube that is part of the crystal structure of sodium chloride (common table salt). The edge of the cube is 0.281 nm (1 nm = 1 nanometer =10-9 m) in length. Find (a) the distance (in nanometers) 0.281 between the sodium ion located at nanometers one corner of the cube and the chloride ion located on the diagonal at the opposite corner. (b)the value of 0