Questiоns 17-19 аre bаsed upоn the fоllowing cаse study about Robby. CASE: Robby is a 19-year-old male who works at a steel manufacturing plant. At work Robby experienced a severe laceration from a machine across the distal portion of his right (dominant side) volar forearm. The laceration was about ¼ inch deep and nearly four inches wide. In the hospital, the surgeons were able to perform tendon and muscle repair. At this point it is unclear if any nerves were damaged due to the laceration. After spending 8 weeks in a partial cast (no movement allowed), Robby has his first outpatient therapy evaluation with you today. Now the doctor has ordered full range of motion and strengthening as tolerated. However, his movement is somewhat limited and stiff due to immobilization and repair. Because of his manual labor job and active lifestyle, he has muscular forearms and larger hands. Which movement is likely to be weak and/or absent at this point in recovery?