a. What is meant by the terms 'arithmetic and logic unit and floating-point unit? Describe two differences between them as well as the role that they play in modern-day computing. (5 marks) The maximum word limit for Question 3(a) is 70 words. b. A musician is looking to digitise a song from their record collection and is trying to establish how much space the sound file will take up on a portable hard drive. For recording the sound file, they are looking to use a sampling rate of 44 kHz with each sample being 4 bytes, initially on a single channel (mono). i. How many bits are there in each sample? ii. How many bits per second are processed while the music is being recorded? Express your answer in scientific notation to 3 significant figures. iii. The piece of music is 6 minutes and 20 seconds long. How many bits are processed in total? Express your answer in scientific notation to 3 significant figures. iv. If the sampling rate is increased to 128 kHz, how many bits will be processed using the same piece of music? Express your answer in scientific notation to 3 significant figures. v. What is the percentage increase in the number of bits processed as a result of increasing the sampling rate from 44 kHz to 128 kHz? Express your answer to the nearest percent. vi. After increasing the sampling rate, what would be the result of producing the sound file over two channels (stereo)? Express your answer in scientific notation to 3 significant figures.