Answer:
Given the regular expression as follows:
[A-Za-z19]{5}
The acceptable input is a code with five characters and each character can consist of uppercase lowercase of alphabet from A-Z or a-z and digit 1 and digit 9. The examples of input that meet the regular expression rule are as follows:
abx11
Acd19
CAD19
Explanation:
The characters specified within the square bracket in regular expression are the character sets that meet the rule. A-Z and a-z means all the uppercase and lowercase English alphabet are acceptable. 19 means digit 1 and 9 are part of acceptable character sets. The 5 enclosed by the curly bracket, {5}, means it must have exact five occurrences of characters.
That would depend on what you would like to get out of your experience with the web broswer. Google chrome offers more efficient computational algorhythms, a quicker navigation of the UI, but loses privacy due to the connected google services which can report your data usage if not properly configured.Browsers like firefox offer extension capability (the same as google chrome) and is open sourced, but may be slower to navigate depending on user to user experience.Other browsers i would avoid unless they are: TOR (which is still just a heavily modified and secured version of firefox).