Suppose that the username of myITU system must satisfy the following requirements: (i) each username must be eight to twelve characters long; (ii) each character in the username must be a letter (a-z or A-Z) or a digit (0−9); and (iii) each username must contain at least one digit (0−9). (iv) each username must start with a letter (a-z or A-Z). How many possible usernames are there for myITU system? Provide your argument to support your answer

Which of the following are types of formatting you can apply to a spreadsheet? choose all that apply.

What are two of the most common reasons that peolpe who need mental health care do not access it?

One of your customers wants you to build a personal server that he can use in his home. one of his concerns is making sure he has at least one backup of their data stored on the server in the event that a disk fails. you have decided to back up his data using raid. since this server is for personal use only, the customer wants to keep costs down. therefore, he would like to keep the number of drives to a minimum. which of the following raid systems would best meet the customer's specifications? a. raid 0 b. raid 1 c. raid 5 d. raid 10