Answer the following questions for y=4 sin (-2x - 7) + 7. Express your answers as simplified fractions if necessary and express points as ordered pairs. (a) Identify the amplitude, period, phase shift, and vertical shift. (b) Graph the function and identify the key points on one full period. Part: 0 / 5 Part 1 of 5 (a) Identify the amplitude, period, phase shift, and vertical shift. The amplitude is X