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Complete the table below by filling in the blank spaces.

Using the scale 1 cm to represent `30^0` on the horizontal axis and 4 cm to represent 1 unit on the vertical axis, on the grid provided, draw the graph of y=cos`x^0` and y=2cos`1/2 x^0` on the same axis.
(a) Find the period and the amplitude of y=2 cos `1/2 x^0`
(b) Describe the transformation that maps the graph of y= cos `x^0` on the graph of y=2cos`1/2 x^0`