Please answer these questions for m :( this is the thing to read

Characteristics of Electromagnetic Spectrum
Analog vs. Digital Signals
Multiple frequencies of the electromagnetic spectrum can carry communication signals and mass amounts of information. In general, signals sent using higher frequencies of the electromagnetic spectrum travel shorter distances but have a higher data-carrying capacity. This physical characteristic of electromagnetic waves limits the range and availability of frequencies for sending information.

The electromagnetic spectrum is a limited resource. Since electromagnetic waves move outward in all directions, wave transmitters need to be focused to transmit their signals to a single specified location. Likewise, wave receivers can be focused to maximize signal reception from a particular location. However, the receiving antenna may still detect unintended signals that can interfere with reception.

To avoid signal interference problems, multiple users cannot transmit radio signals at the same frequencies, at the same time, and in the same direction. The spectrum is scarce; at any given time and place, one use of a frequency prevents it from being used by others in the same location. As soon as one user stops transmitting signals over a portion of the spectrum, another user can immediately re-use it.

There are two important types of signal transmissions to understand: analog and digital.

wave that rises and falls
Analog wave
Analog signal transmission information (sound, video, or data) travels in a continuous wave whose strength and frequency change depending on the amount of data being submitted.

Travels in a continuous wave
Strength and frequency vary

and the questions:

1. Electromagnetic waves can carry more data at higher frequencies. Why would a scientist opt to transmit data at a lower frequency instead?

2. What are the limitations of sending information using electromagnetic waves?
What are the differences between analog and digital signals?

3. What are the advantages of using digital signals over analog signals?

4. Using reliable internet sources, identify three ways we use analog and digital signals in our everyday lives.

please site the sources used