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A force $\stackrel{\to }{F}=\left(5\stackrel{^}{i}+3\stackrel{^}{j}+2\stackrel{^}{k}\right)N$ is applied over a particle which displaces it from its origin to the point $\stackrel{\to }{r}=\left(2\stackrel{^}{i}-\stackrel{^}{j}\right)m$. The work done on the particle in joules is

(1) – 7

(2) +7

(3) +10

(4) +13