QUESTION $4$ What is the angle between the two vectors; A with rightwards arrow on top equals $2$ i with hat on top minus $6$ j with hat on top and B with rightwards arrow on top equals negative $5$ i with hat on top minus $2$ j with hat on top

a$\mathrm{.}87$

b$\mathrm{.}65$

c$\mathrm{.}45$

d$\mathrm{.}29$

e$\mathrm{.}129$