We'll finish up this topic by considering some additional planes. What I have over here is a series of planes that are indicated A through D, and what we want to do is to use the rules that we've already described in the previous lectures, where we identify the coordinates of the intercept. We take reciprocals, we clear fractions, and we write the integers in parenthesis and there are no commas. And when we come across a negative number, we put that negative number on top of the particular system. We'll look at the A through D, and then we'll look at E through F. And when we describe those planes, what we see, for example, is given here. We have the A Plane, if we look at that back origin that we have up indicating that X, Y, and Z, what we see is, we have the infinity infinity 1, so that becomes the 001 plane. We look at B, the intercepts are at 1, 1, and 1, and therefore, when we take the reciprocals, we wind up having the 111 plane. When we look at Plane C, this is a dihedral plane, and what we'll see here is the intercepts of 1, 1, infinity since it never intersects the Z axis and we get the 110. Now when we look at D, what we see is that plane is such that it represents a bottom position and therefore, when we describe that particular plane, what we will see is the infinity, infinity negative one or the 001 bar. When we look at Plane E, we see that the intercepts are for x equal to 1. When we look at the y axis, it never intersects the y axis, but it intersects the z one-half of the way up. And therefore, we have the 1, infinity, one-half, those are our intercepts. And when we take the reciprocals of those, we wind up getting the 102 plane. If we look at the last plane, that F Plane where one half of the way out in X, one half of the way out in Y for our intersects, we intersect Z at 1 and therefore this becomes the 221 Plane. We want to make sure that we understand how to describe these planes, because as we go through the lectures, we're going to see the importance of being able to utilize this method of identifying planes. And it will become ultimately, it'll become a standard language that we will use when we're talking about specific planes and directions of interest in our crystal structures. Thank you.