For the following languages, give a simple one-sentence description and show two strings that are in the language and two that are not (unless there are fewer than two, in which case show as many as possible). For each Σ = {a, b} a= ℒ {w I exactly one prefix of w ends with a b}
b= â„’ {w I exactly one suffix of w begins with a b}
c= â„’ {w I exactly one prefix of w begins with a b}
d= â„’ {w I exactly one suffix of w ends with a b}
e= â„’ {w I all suffixes of w begin with a b}
f= ℒ {w | Ǝμ∈Σ+(w = aua)}
g= ℒ {w I Ǝμ∈Σ* (w= u^3)}

Some of the items below indicate the steps required to move a slide to a different location in a presentation. select those steps and indicate the order in which they should be performed to move the slide. (for example, if an item describes what you do first, select 1.) included in the list are items that are not part of the process. for these items, select n/a, an abbreviation for not applicable. 1 — first 2 — second 3 — third 4 — fourth 5 — fifth 6 — sixth n/a — not applicable drag the slide to the desired place. enter the slide position desired. hold the mouse button down. select move from the tools menu. select the slide. switch to the notes view.

Data is processed, stored, and transmitted as a series of 1s and 0s. each 1 or 0 is called a(n) . a series of eight 0s and 1s, called a(n) , represents one character—a letter, number, or punctuation mark. data becomes when it is presented in a format that people can understand and use. digital signals are represented by two different , such as +5 volts and +.2 volts. digital data can also take the form of light and dark spots etched onto the surface of a cd or the positive and negative orientation of particles on the surface of a hard disk. data consists of numbers that might be used in arithmetic operations. it can be represented digitally using the number system. data is composed of letters, symbols, and numerals that are not used in arithmetic operations. computers represent this type of data using , ebcdic, unicode, or utf-8. data is quantified using terms such as or kibibyte (1024 bytes), and prefixes such as or mebi (1,048,576), and giga or (1,073,741,824). to reduce file size and transmission times, digital data can be compressed. compression provides the means to compress data and reconstitute it into its original state. compression throws away some of the original data during the compression process. compressed files usually have at the end of the file name and are represented with special icons. these files have to be or unzipped before you can view the data they contain.

Designing a mobile web page is a little different from designing a regular web page. name at least three features that should be considered when designing a website that is mobile phone-friendly, and briefly explain why they are important.