Determine the interplanar spacing and the length of the Burgers vector for slip on the expected slip

Question:

Determine the interplanar spacing and the length of the Burgers vector for slip on the expected slip systems in FCC aluminum. Repeat, assuming that the slip system is a (110) plane and a [11] direction. What is the ratio between the shear stresses required for slip for the two systems? Assume that k = 2 in Equation 4-2.