There’s been quite a lot of discussion on this question in the forums recently on the first question. I’m gonna link you to some things that have already been said:
Otherwise, diversity is a perfectly acceptable thing to mention however I would encourage you to really substantiate your answer with statistics and also be as specific as possible about what initiatives the firm can introduce to address the issue.
For the second question, that's admittedly a really broad question so personally I'd probably start my answer by saying I'd ask my friend for more context on the business model, it's product and how he intends to generate revenue. I think maybe that would demonstrate that you understand the best kind of advice is tailored business specific advice but maybe only do this if the word count allows it. Some general advice I'd probably offer after that would look at things like:
1. Ensure the product/business has a USP that is not easily replicate/available on the market
2. How will the business ensure customer loyalty? Who is the target market? What are their needs and how does the business fulfil them? I think an increasingly important factor for business is being able to cater to changing consumer demands (think of all the trouble the retail industry is having and the shift from mere stores to providing a shopping experience). Another point you could make here is how environmentally conscious consumers are and how maybe the business should capitalise on this ESG focus.
3. Capital. How will your friend fund the business? A loan or investment from others, i.e. debt or equity. Which would you advise him to choose? Bear in mind that for a small business just starting out the arguments in favour of one or the other change drastically from the information on the internet, although I don't think there is a specific right answer.
4. Having a strong long term business plan. What is the business's target profit, how much would need to be reinvested to develop the efficiency of the business (increasing product offering, increasing distribution capabilities) what is the business's strategic goal? It's hard for businesses to last long if they only have one successful product that they don't try to then expand on/if they don't have a larger vision for the business.
If you have the time I'd encourage you to watch this video by Will Ackman
It's on investing in a business but he actually makes some really good points on what makes a good business to begin with which may be helpful for your question. It's a rather long video though so maybe watch it on double speed haha.
I hope that helps!