Determine the amplitude, the period and the phase shift of the function
1. y = 1/3 cos ( -3 x ) + 1
2. y = cos ( - 2 PIE x ) + 2
3. y = ½ sin (2 PIE x + PIE )
4. y = - ¼ cos (PIE x - 4 )
5. y = 2 sin (2 PIE x + 1 )
6. y = ½ sin ( 2 x - PIE/4 )
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