4. Let =<1, -2> and <1,1> (a) Find 7+7 and 27-37. Write the result both in terms of components < x,y > and standard unit basis vectors. (b) Illustrate geometrically of 7+7 and 27-37. Let initial points of and at the origin in the Cartesian coordinate. (c) Find 7+7 and 27 - 37| (d) Find unit vector in the direction of +7 and 27-37

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