Given the OpenGL command gluLookAt(2, 5, 3, 8, 2, 3, 0, 1, 1). Calculate the direction of positive z-axis of the camera coordinate system and the model-view matrix that transforms object coordinates to camera (eye) coordinates. Given the OpenGL command gluLookAt(2, 5, 3, 8, 2, 3, 0, 1, 1). Calculate the direction of positive z-axis of the camera coordinate system and the model-view matrix that transforms object coordinates to camera (eye) coordinates