please help me

l.......1_. -.1"" ... ..........._', ""U"'U'-l"' _. .. U. . ......l 1. Elsa and Anna are having a debate about Whether the vectors (1, 2,4) and (3,6, 8) are parallel. Anna checked their dot product, and Elsa checked their dot product. Which princess's approach will allow them to determine an immediate answer to Whether the vectors are parallel, and why? 2. Determine the lengths of each of the vectors (1, 2, 4) and (3,6, 8)