This is Introduction of Computation.

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6) (4 pts) Give a regular expression for a certain type of scientific notation for real numbers on which the following rules hold. Let = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, +", "-" a. The number can be preceded by a +" or"-" sign or the sign may be absent. b. Numeric values must be of the form cb,b2...bn where b, is any digit, but c must be nonzero. C. The number may be followed by an exponent field of the form e""y2 ore"-"y1v2, where Y1 and y2 can be any digit in 10,1,2,3,4,5,6,7,8,9). (Note: With this convention "+"is the sign associated with the scientific number and+the operator of the regular expression.)