For each of the following, identify the error that the student has made in base ten and describe an analogous error in base fen. (a) The student counts: "one hundred and seven, one hundred and eight, one hundred and nine, two hundred, two hundred and one, two hundred and two..." (b) The student looks at the numeral 31, 407 and says that it is "three million one thousand four hundred and seven." (c) The student looks at the number 31, 407 and says that it is "three thousand one hundred and forty seven." (d) The student subtracts 5 from 302 and gets 207.