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6. (a) ! List the four possible ways in which two lines in R3 can intersect. You can use diagrams to explain, if you want: (b) iExplain what you understand by skew lines. TEST #5: LINES AND PLANES, Page 5 of 6 (e) : Show that the lines with vector equations L1: F:(2,1,0)+s(1,1,1), 36R L2: F=(0,1,0)+t(1,1,2), teR are skew lines