4) The titles of the two graphics are all graphic of functions'; 5) Add a text +sin(2x)' in [pi/2,0] of the first graphic, add a text fcos(2x)'in (pi/4,0] of the second graphic graphic of functions graphic of functions -yi=sin(2x) = 7-y2-cos(2x) 0.8 M 0.8 1 0.6 0.6 y 1 1 0.4 0.4 0.2 1 0.2 1 Ordinate 00 sin(2x) ( Ordinate 0 () cos(2x) -0.2 -0.2 1 -0.4 -0.4 1 1 -0.6 -0.6 2 -0.8 -0.8 fa -1 -1 0 0 3 3 4. 1 2 1 2 Abscissa Abscissa Write the following matrix in to the file my.txt, and there is a carriage return at the end of each row. Then, read the first 500 numbers from my.txt. (10 points) 1 2 3 100 101 102 103 200 201 202 203 ... 300 .. 901 902 903 ... 1000