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Using Unix Command Line Grep Regular Expression Grade 00 Range 07 40 Must Match Numeral 0 Q43824743

Using the Unix command line with grep, what is the regularexpression for a grade that can be 0.0, or in the range 0.7 – 4.0That is, it must match:

1. The numeral 0, followed by a period, followed by a zero
2. Or the numeral 0, followed by a period, followed by any numeralin the set 7, 8, 9
3. Or the numeral 1-3 followed by a period, followed by anynumeral
4. Or the numeral 4 followed by a period, followed by the numeral0

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