Which example is not the proper use of a casting of a toolmark?

a) comparing with the cast of a suspect tool
b) comparing with a photograph of a suspect tool
c) examining for other trace evidence adhering to the cast
d) comparing directly to a suspect tool

which best describe annealing

a) glass mixture cools without crystallizing
b) glass mixture is combined with molten tin
c) the glass mixture is melted
d) chemicals are mixed to form glass

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).