design an Armstrong indirect FM modulator to generate an FM carrier with a carrier frequency of 96 MHz and Df= 20 kHz. A narrow-band FM generatorwith fc = 200 kHz and adjustable Df in the rangeof 9 to 10 Hz is available. You are also provided with anoscillator with adjustable frequency in the range of 9 to 10 MHz.There is a bandpass filter with any center frequency, and onlyfrequency doublers are available.