exam Maths Puzzle Numerical Ability

Can you help me with this trigonometry problem?

Give 5 keypoints and sketch the graphs of
y=3Sin (x-pie/3)

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exam Other Question
It states to solve equation, if the sytem is inconsisten or has dependent equations, say so:

x+3y+z=2
4x+y+2z=-4
5x+2y+3z=-2 Write down the coefficient of the term 4x4y2z in the algebraic expression 4x4y2z - 3x3y2z + 3/2xy3z2.