3) Find the Fourier series representation of x(t) with the first period signal x1(t) = 4u(t + 1) – 5u(t – 3) +u(t – 4) Show the magnitude line spectrum.

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1-What phrase is used when a substitution is permitted for a specific item? 2-The specifications state that all work shall be done... 3-What phrase is used when a substitution is permitted for a specific item? 4-What is the purpose of an electrical symbol? 5. Where are notations found?

Instruction: Identify the parts/components as illustrated in the pictures and write down the corresponding letter of each function written below: Computer Standard Parts: Funtions: A. A device that sends information to a computer system for processing. B. Control instructions and data flow to and from other parts of the computer. It is the heart and brain of a computer. 1. 2. C. It execute the instructions, control storage data and input or output devices attached the computer. Basic Components: D. A printed circuit board that is the foundation of a computer and is considered to be the backbone of the computer. E. Reproduces or displays the results of that processing. 3. 4. Name of Parts/Components Corresponding Function Letter / (yes), X (no) / (yes), X (no) 1. 2. 3. 4. 5.