Respond to the following in a minimum of 175 words: 

Using the information from this week’s required learning activities:

• Identify the principal problem-solving steps for developing new information systems or enhancing existing ones.
• What different considerations are necessary when designing for public sector stakeholders as opposed to local or state government stakeholders?
• How do these steps support effective IT design?
• Describe the four phases of the systems development life-cycle and at least one alternative to designing and building an effective IT system and describe some advantages and disadvantages inherent in each of the phases?

 Support your statements using APA style references.