Suppose we are recording music using a microphone (mono) with cut-off frequency of 44 Khz. We use an ADC (Analog-to-Digital Converter) to digitize the output of the microphone, and then we write the digital signal onto a disk with size 120 MB (1MB=106 bytes). What is the minimum sampling period we should can use if we want to be able to record at least 30 minutes of music (assuming the signal is quantized with 16 bits) with the least aliasing?