Hello all, i need some help with these questions. I didn't have any clue on how to approach these so an explanation would be appreciated.

1.) O, A and B are the points (0,0), (3,4) and (4,-6) respectively.

a.) C is the point such that OA = OC + OB. Find the coordinates of C

b.) D is the point (1,24) and OD = hOA + kOB. Find the values of h and k.

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2.) If a = 5i - sj + 2k and b = ti + 2j + uk are equal vectors, find

a.) i.) s

ii.) t

iii.) u

iv.) Magnitude of a

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