For each pair of points, find: the distance AB and the midpoint of [AB].
a. <b>a</b> A(0,0,0) and B(6,−4,2)
b. <b>b</b> A(4,1,0) and B(0,1,−2)
c. <b>c</b> A(1,−1,2) and B(5,−3,0)
d. <b>d</b> A(−2,0,5) and B(−6,7,3)
e. <b>e</b> A(−1,5,2) and B(4,1,−1)
f. <b>f</b> A(2,6,−3) and B(−5,3,2)