Answer
The sums ${{\bf{v}}_1} + {{\bf{v}}_2} + {{\bf{v}}_3}$, ${{\bf{v}}_1} + 2{{\bf{v}}_2}$, and ${{\bf{v}}_2} - {{\bf{v}}_3}$, are shown in the figure, respectively.
Work Step by Step
To sketch the sums, we use the definition of vectors and the Parallelogram Law.