Cross products 1. For all of the following, 13,15,175 are vectors in R3 (cross products are not dened outside of R3). As with last week, scaling will be denoted by writing a scalar adjacent to a vector like 21')\". and multiplication of numbers will be denoted similarly as ob, with no additional symbol. Which of the following expressions are meaningful, and which are meaningless? 2. Compute the following three cross products. a) (3,1,4) >