$2.$ A non$-$pipelined system takes $100$ns to process a task. The same task can be processed in a f ive$-$stage pipeline with a clock cycle of $20$ns$.$ Determine the speedup ratio of the pipeline for: $($a$)10$ tasks $($b$)100$ tasks $($c$)1000$ tasks $($d$)$ What is the theoretical maximum speedup? Explain your answer.