processing is sorting operation on all of the employee recordsand that an external sorting algorithm is used the company' payroll program is so good that it plans to hire out its services to do payroll processing for other companies the president has an offer from second company with times as many employees she realizes that her computer is not up to the job of sorting times as many records in an acceptable amount of time describe what impact each of the following modifications to the computing system is likely to have in terms of reducing the time required to process the larger payroll database (aa factor of two speedup to the cpu (ba factor of two speedup to disk / time (ca factor of two speedup to main memory access time (da factor of two increase to main memory size how can the external sorting algorithm described in this be extended to handle variable-length records projects for database applicationassume it takes ms to read block from disk ms to search for record in block stored in memoryand that there is room in memory for buffer pool of blocks requests come in for recordswith the request specifying which block contains the record if block is accessedthere is probability for each of the next ten requests that the request will be to the same block what will be the expected performance improvement for each of the following modifications to the system(aget cpu that is twice as fast (bget disk drive that is twice as fast (cget enough memory to double the buffer pool size write simulation to analyze this problem pictures are typically stored as an arrayrow by rowon disk consider the case where the picture has colors thuseach pixel can be represented using bits if you allow bits per pixelno processing is required to unpack the pixels (because pixel corresponds to bytethe lowest level of addressing on most machinesif you pack two pixels per bytespace is saved but the pixels must be unpacked which takes more time to read from disk and access every pixel of the image bits per pixelor bits per pixel with pixels per byteprogram both and compare the times