Please show work in Excel using goal seek function!

This problem requires to use Goal Seek function. Fail to use Goal Seek function will not receive any credit. Greg Winston has gone bankrupt and started a lemonade stand. He has invested $400 in lemonade equipment and sells a glass of lemonade for $4. His unit cost of producing a cup of lemonade is $2.50. For both Part a and Part b below, show how to conduct the Goal Seek function. You can take a screenshot of the Goal Seek dialog after fill in Set cell, To value, and By changing cell or simply describe what you put in each of the textboxes. Goal Seek ? Set cell: To value By changing cell: OK Cancel a. How many glasses of lemonade must Greg sell to breakeven? b. How many glasses of lemonade must Greg sell to generate a profit of $350