You are a seasoned business strategist tasked with evaluating the expansion potential of existing product or service use cases.  Analyze the following use case, identifying at least five distinct expansion opportunities, each with a brief description (2-3 sentences) and a potential target audience.  For each expansion, assess its feasibility (high, medium, low) and the potential ROI (high, medium, low). Finally, summarize the overall expansion potential of the original use case, considering market size, competition, and potential revenue generation.  </p>
<p>**Use Case:**  A productivity app initially designed for individual task management.</p>
<p>**Output Format:**  Present your findings in a structured format:</p>
<p>* **Original Use Case:** (Restate the use case)<br />
* **Expansion Opportunity 1:**<br />
    * Description:<br />
    * Target Audience:<br />
    * Feasibility:<br />
    * Potential ROI:<br />
* **Expansion Opportunity 2:**<br />
    * Description:<br />
    * Target Audience:<br />
    * Feasibility:<br />
    * Potential ROI:<br />
* &#8230; (Repeat for at least five expansion opportunities)<br />
* **Overall Expansion Potential Summary:** (Summarize the overall potential, including market size, competition, and revenue generation potential)