my hw assignment

I need 1 or 2 pages of work on this. i dont need a intext citation. i just need the website at the end of the answer where you got answers from 

1. Discuss several examples of where TDMA and FDMA are used in the real-world today.

(1-2 pages of ansswer and the citation at the end)

2. In general, what is the optimal antenna length for transmitting and receiving at various frequencies? How about at cellular frequencies?

(same requreimt)

3. Discuss the changes and new features for versions 3.0, 4.0, 4.1 of the Bluetooth standard.

(same requirment)

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4) I need 3-4 pages on each of these. I dont need intext citation. u can use wikipedia as source and any other internet site. just post the website where u got it from at the end of it. 

Part 1. [20 points] Explain in detail how spread spectrum communications work. Explain the difference between FHSS and DSSS. Give two detailed real-world examples of where spread spectrum communications are used today.

Part 2. [20 points] Explain in detail how FDMA, TDMA, and CDMA work. Give two examples of where each is currently used in the real world.

Part 3. [20 points] Explain in detail what is an isotropic antenna. Explain what is the units of dBi, and how it relates to an isotropic antenna.

Part 4. [20 points] Explain in detail what is a Fresnel zone. Why is it important? How can the size of a Fresnel zone be calculated?

Part 5. [20 points] Explain in detail what is an antenna radiation pattern. Show examples of the radiation pattern for a directional antenna and for an omnidirectional antenna.