1. Following are examples of an object called "single zero integer" or <SZI>:
-701, +3210, 311077, +320345, -14302345, 1123405, -20, 505
SZI are decimal integers where one digit is zero, and all other digits are non-zero.
Zero cannot be the leading digit. For example, the following numbers are not SZI:
011, -100, 0, 1001, 007, -911, +3, 77.
(a) Write a syntax diagram for SZI
(b) Define the SZI syntax using BNF
(c) Define the SZI syntax using EBNF
(d) Define the SZI syntax using parenthetic notation