GENERAL GUIDELINES FOR ALL QUESTIONS The symbol of approximation before an input field means that the corresponding numerical answer must be rounded to a le-digit floating point number (as specified in the corresponding question) floating-point numbers must be entered either as usual decimal numbers, or in the e-notation, that is in the form or in the form 10.d,d...don td-dden where d, are digits and n Z is an integer number, notice the absence of a space before and after the symbol e (if a space or any other irrelevant symbol will be present before, or after the symbol e, your answer will either downgraded, or ignored), accordingly, please DO NOT enter floating-point numbers in the form or in the form 10.dida da 10'n, dd.d...da 10'n, all such inputs will be ignored, the following convention is to be applied to determine whether a given floating-point number a must be entered as a usual decimal number: a must be entered as a usual decimal number if and only if 10a]