Volleyball drill: underhand technique at an angle

Player stands at the left back and pushes the ball to the midfielder. There is a catcher and he brings the ball to the trainer, who then starts to push up 3 times. Tester is going to catch the ball. Same, only now the player is standing at the right back. Catcher brings ball to trainer and then blocks 2x. Player starts at mid-back and gets the ball at the right back or left back. He pushes to the midfield and there is a sv who plays the ball along the net and then the player may attack or play the ball over the net.