what is the explain for this expression?

Here, the regular expression rn(2++\{(1,2})?\d{10}S is used to match phone numbers. It is made of the following parts: A. This is called an anchor. It specifies that the regular expression must match the start of the input. (?) - This is called a non-capturing group. It groups the enciosed pattern together, but does not capture the matched text as a separate group + - This matches a literal plus sign. Id {1,2} - This matches 1 or 2 digits. The {1,2} is a quantifier that specifies the number of times the preceding character or group can be matched. ? - This is a quantifier that specifies the preceding character or group is optional. Id(10) - This matches exactly 10 digits. S. This is also an anchor. It specifies that the regular expression must match the end of the input. So the regular expression matches a phone number that starts with an optional plus sign followed by 1 or 2 digits, and then exactly 10 digits, and ends with the end of the input. * Explain the following regular expression * r(?+1d{1,3})?\{9,11}S Write your explanation here