The following code segment measures the time elapsed since the previous animation frame. let prev= Date.now(); function animate() { let now = Date.now(); let delta Time (now prev) 0.001; prev= now: } In function animate(), why do we multiply by 0.001? O To obtain how many microseconds have elapsed O To obtain how many milliseconds have elapsed O To obtain how many seconds have elapsed O To obtain how many minutes have elapsed Question 2 If we are rotating an object, should we send the rotation matrix to the vertex shader or fragment shader? O vertex shader O fragment shader