1.Shortest distance between r⃗=3i^+5j^+7k^+λ(i^+2j^+k^)\vec{r}=3\hat{i}+5\hat{j}+7\hat{k}+\lambda(\hat{i}+2\hat{j}+\hat{k})r=3i^+5j^+7k^+λ(i^+2j^+k^) and r⃗=−i^−j^−k^+μ(7i^−6j^+k^)\vec{r}=-\hat{i}-\hat{j}-\hat{k}+\mu(7\hat{i}-6\hat{j}+\hat{k})r=−i^−j^−k^+μ(7i^−6j^+k^) isa.1655\frac{16}{5\sqrt{5}}5516b.2655\frac{26}{5\sqrt{5}}5526c.3655\frac{36}{5\sqrt{5}}5536d.4655\frac{46}{5\sqrt{5}}5546Login to continueOnly logged in users canattempt or see the solution.