B. Define the following microscopy terms: Focus: Resolution: Contrast: C. Describe your observations from fresh yogurt slide you prepared in Part III. D. Were there observable differences between your fresh yogurt slide and the prepared yogurt slide? If so, describe them. E. Describe the four main bacterial shapes F. What are the common arrangements bacteria are found in. G. Were you able to identify specific bacterial morphologies on either yogurt slide? If so, which types? H. Describe the cells you were able to see in the blood smear. I. Are the cells you observed in your blood smear different than the bacterial cells you have observed? Why or why not? J. What is the purpose of immersion oil? Why does it work?