Write a BNF grammar that describes the structure of a nonterminal called . Assume that contains an optional sign followed by exactly two decimal digits, the first of which cannot be a 0. Thus 23, 91, and 40 are legal, but 9, 01, and 123 are not. Using your grammar from Exercise 5a, show a parse tree for the value 90.

Column a of irma’s spreadsheet contains titles for each row, but her document is too big and will be printed three pages across. she wants to be sure that every page will be understood. what can irma do to with this problem?

Could you find out how im still getting an 83 percent on this in edhesive a = input("enter an animal: ") s = input ("enter a sound: ") e = "e-i-e-i-o" print ("old macdonald had a farm, " + e) print ("and on his farm he had a " + a + "," + e) print ("with a " + s + "-" + s + " here and a " + s + "-" + s + " there") print ("here a " + s+ " there a " + s) print ("everywhere a " + s + "-" + s ) print ("old macdonald had a farm, " + e)

Which program can damage your computer?