12.1 Describe drilling production estimation process. 12.2 Outline drilling production estimate steps one to twelve, and provide similar example as outlined in class notes. 13.1 Describe the history of rock blasting in one paragraph. 13.2 Outline the rock drilling blast design. 13.3 Explain the principle of rock breakage. 13.4 Outline and describe the rock blasting one to twelve productivity steps. 13.5 Explain the pre splitting in one paragraph. 136 Summarize available rock blasting references using the library research and goo gle search. 14.1 Describe the screening process. What are screens used for? Outline main screen components. 14.2 What are the sizes and types of mesh used for screening? 14.3 Outline the screening capacity estimates and describe the productivity steps one to seven