Financial Planning

Financial Planning for a retirement savings account. I have completed the first section of homework that includes creating an excel graph of retirment plan. The remaining part of the homework only needs to cover sections: 

What will happen to savings if you receive Social Security benefits?  How does this affect your calculations?
What if your employer matches your contributions dollar for dollar up to 100% of your salary?  How does that affect your calculations?
How will taxes affect your calculations?  
If you max out your Roth IRA every year and maximize your employee matching contribution in your 401(k), how does that affect your calculations?

Keep in mind that Roth plans have a contribution maximum and that taxes are based on your income. 

I will only purchase correct work with data to support the findings. Attached are (1) assignment guidelines (2) my completed work in excel format.