An embedded system is required to vary the brightness of an LED depending on the position of a variable resistor (potentiometer). Pulse width modulation should be used to vary the brightness and an ADC to determine the potentiometer position. The program is to be a cyclic system. (i) Suggest, with a brief explanation, approximate values suitable for this application of the following parameters: the PWM modulation frequency, the number of different brightness levels, the number of different duty cycle values and the ADC resolution. (ii) Describe the peripherals and parts of the program (tasks, ISR etc) you would use to implement this application, explaining both how the how the different program parts interact and how the peripherals are used. (iii) The PWM peripheral uses a 16 bit counter. Suggest a suitable frequency for clocking this counter, based on the parameters suggested above