Question 3 cont'd. // Get brightness of the pixel at row r, col c; indices start at 0 ; // calculated as quotient of (Red+Green+Blue) divided by 3 protected int getBrightness ( int r, int c ) //2% 1 \} // end of method // Convert this PPM to a grayscale image represented in a 2D array. // Create, fill and return a 2D array of the same width and height // of this PPM image. You MUST use the method getBrightness(). protected int[][] convertToGrayScale ( ) //6 \{ \} // end of method \} // end of class PPM What is the best-fit data type for storing the brightness of a pixel given the max value is 255 ? //1%