this question is post on chegg but not answer. i need the answer.. the video to watch for thr questions is Dan Bricklin: " Meet the investor of the Electronic Spreadsheet"

Question: In June of 1979, SoftwareArts, a software publisher, annou 1. In June of 1979, SoftwareArts, a software publisher, announced VisiCalc to the world, at the giant National Computer Conference in New York City. Why was this an important development for business? 2. Where and within what context did Dan Bricklin come up with the idea for VisiCalc? 3. What is meant by the case study approach to learning business? 4. In his Ted Talk, Bricklin mentions some of the typical business projects that computer programmers worked on during the 1970s. What type of projects/applications did he mention? How did those projects differ from what Bricklin had been working on? 5. What does Bricklin mean by "prototype" in the video? 6. By 1982 VisiCalc's price had risen from $100 to $250. Several competitors appeared in the market, notably SuperCalc and Multiplan, each of which added more features and corrected deficiencies in Visicalc. In 1983 Lotus 1-2-3 was launched by a competing software publisher. 1-2-3 was written by a former VisiCalc employee. Unlike the PC version of VisiCalc, 1-2-3 was written to take full advantage of the PC's increased memory, screen and performance. Yet it deliberately attempted to remain as compatible as possible with VisiCalc, including copying its menu structure as far as possible to allow VisiCalc users to easily migrate to 1-2-3. The program was an immediate runaway success, and sales of VisiCalc evaporated almost overnight. 1-2-3 became the corporate spreadsheet of choice and an industry was created of compatible add-on products. But by the year 2000, Lotus 1-2-3's market share had substantially shrunk and today is no longer sold by IBM. Please Google the topic of Lotus 1-2-3, determine what led to its demise, and explain the failure of this once standard electronic spreadsheet