a = 2î - j+ 3k b=i-sj+2k c = 4j-k (а) (b) (c) (d) Determine the sum of the vectors a, b and c. Calculate the magnitude of the sum. Find the unit vector in the direction of the sum. Find the vector a + 2b. Find the unit vector parallel to 3c- a +b. (e)

Q: a= b=

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