Why wont let me post my picture to my profile account.

Technician a says that if a valve is open when a piston rises to the very top of a cylinder, the piston may actually strike the valve head and cause serious engine damage. technician b says if the camshaft is located in the engine block, then the engine is called an overhead valve engine, ohv engine, or an in-block camshaft. who is right? a. b only b. both a and b c. a only d. neither a nor b

Im doing this last minute and literally none of my neighbors or people that my dad works with use excel so if anyone could me make up an example

1. for which of the following are you not required to signal beforehand? a. changing lanes b. speeding up c. stopping