The prototyping model of softwaredevelopment is
o a reasonable approachwhen requirements are well defined.
o a useful approach when acustomer cannot define requirements clearly.
o the best approach to usefor projects with large development teams.
o a risky model that rarelyproduces a meaningful product.
o an old fashioned modelthat is rarely used any more

cyberstalking on the internet means to harass or stalk someone, a group, or an organization. this may include defamation, slander, and false accusations. in many jurisdictions, cyberstalking is a criminal offense. 

on the other hand, cyberbullying focuses more on intimidating, threatening or harassing someone. harmful bullying include posting threats, rumors, and sexual remarks.