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The text reads, questions,

Q 1. Which color wave leads the red wave by a phase angle of start fraction pi over 4 end fraction?

Green wave, blue wave, purple wave.

Q 2. Which color wave lags the red wave by a phase angle of start fraction pi over 2 end fraction?

Green wave, blue wave, purple wave.

The output is as follow:

The x axis displays time in seconds from 0 to 16, and the y axis displays volts from negative 5 to 5. The green wave starts from (0, 3.5), passes through (2, negative 5), (3.4, 0), (4.8, 5), (7.5, negative 5), (10, 5), and (12.8, negative 5). The blue wave starts from (0, 0), passes through (1.5, 5), (2.8, 0), (4, negative 5), (6.7, 5), (9.5, negative 5), and (12.2, 5). The red wave starts from (5, 0), (1.3, 0), (4, 0), (5.5, 5), (8, negative 5), (9.5, 0), (11, 5), (13.5, negative 5) and (14.9, 0). The purple wave starts from (0, negative 3.5), (3.5, 5), (4.8, 0), (6, negative 5), (7.5, 0), (8.6, 5), (10.1, 0), (11.5, negative 5), (12.9, 0) and (14, 5). All values are estimated.