A civil engineering firm designs bridges to span great distances. Years ago, the firm's first design took approximately 1,000 hours to develop. It has subsequently been able to reduce the time, quite dramatically, and believes it is operating on a 70 percent learning curve. Its next bridge design is to span the peaks of Mount Kilimanjaro and will be the 331st bridge it will have designed. How long will it take to design this unique bridge?

Good day may I have some help with part D and E in the attached pic

In 2005, British Telecom (BT) took a big risk: the company dropped its use of the waterfall system development process and embraced agile development. Previously, BT had outsourced the gathering of system requirements to a third company, which would typically take three to nine months to meet with customers and stakeholders and create a requirements list. Next, the project would move back to BT where programmers often struggled to interpret the requirements and then develop and test the system within 18 months — although some projects needed more time. In late 2005, however, BT took only 90 days to roll out a new Web-based system for monitoring phone traffic. The new system allowed traffic managers to change switches and other physical devices more quickly in order to handle shifts in load along BT’s telecommunications network. The success of this initial project reverberated throughout the IT world, as BT became the first telecommunications giant to adopt agile development—sometimes…

Why does a business analyst does not need to be afraid to wear the design hat, and adopt design thinking especially when it comes to modeling in project managment.