coin the Gensler Architectural firm, all of the computers are part of a local arca network, connected to one main printer. When an architect prints a document, the job is placed in a queue. It may take several minutes before the document begins to print, due to$-$ the number of other print lobs and the complexity of the document. The ume an minutes$)$ until the document starts to print is anexponential random variable X with $/=0\mathrm{.}40.($a$)$ What is the mean time, u$,$ until the document begins to print? Give your answer in minutes to one decimal place.$=($b$)$ What is the probability that the document will begin to print within $30$ seconds? Give your answer to four decimal places.