Help please! I need help with this question, it’s very hard.

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

The blank button automatically displays next to the data when you select a range of numeric data which is an available option for creating a chart

How to apply the fly in effect to objects on a slide