Write a grammar for the language consisting of strings that have n copies of the letter a followed by one more number of copies of the letter b, where n > 0. for example, the strings abb, , and are in the language but a, ab, ba, and aaabb are not.

Awide variety of “ apps “ are available to customize devices. which category of app does the word processing software fall into?

Alex’s family members live in different parts of the world. they would like to discuss the wedding plans of one of their distant relatives. however, alex wants all the family members to talk to each other simultaneously so that they can make decisions quickly. which mode of internet communication should they use? a. blog b. email c. wiki d. message board e. instant messaging

Alcohol’s affects on the cornea and lens of the eye make it more difficult