List any four audio file formats you know, Computer Graphics

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(a)  List any four audio file formats you know.

(b)  UTMDigitlab ltd, specialized in digitizing sound, converts an audio stream of the latest album of Shakira into digital format (16-bit and stereo). Calculate the duration in seconds of a stereo sound file of CD Quality and given the file size is 15 MB.

(c)  Below is a picture showing the CorelDraw 12 working environment. List and briefly describe the function(s) of the three tools (Tool 1, Tool 2 and Tool 3) as shown in Fig.

                                                                        1561_g1.png

(d) Below are two screenshots from Photoshop CS3. List and describe briefly the following tools (Tool 4, Tool 5 & Tool 6) as shown below.

                                                       1734_g2.png

                                                          1383_g3.png

(e) Briefly describe the concept of layers as used in Photo editing software like Photoshop. List one advantage and one disadvantage of using the feature „Flattening an image'.


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