Technician a says when preparing to lower an engine and transaxle with the subframe (cradle), the cradle must be securely strapped to the scissor jack before the cradle bolts are removed from the car. technician b says the cradle will automatically align itself if it's a good quality scissor jack. who is correct

In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?