Based on the common knowledge at the beginning of period I, determine whether or not it is the case that STD = f '? If it is, clearly and carefully explain why; if it is not, clearly and carefully explain why not. (Note: It is left to you to determine the most relevant steps of logic andfor mathematics andx'or graphical analysis that support(s} the conclusion. A conclusion, even if correct, will be awarded ZERO points if there is no or very little support behind it.)