Two students are observing the disassembly of an engine. in the photo shown in figure a-12, a small engine technician has just removed the cylinder head and gasket from the engine. student a says that this is a four-stroke engine. student b says that the engine has an l-type cylinder head. which of the following statements is correct? a. only student a is correct. b. only student b is correct. figure a-12—this photo should be used to answer question 14. c. both students are correct. d. neither student is correct.