please help with the formula needed for this question?

10. Jane wants to calculate the percentage each type of gift contributed to the total amount of gifts. To avoid a divide by zero error in the calculation, she wants to make the calculation using the IFERROR function, which she has already entered. Complete the formula as follows: a. In cell C5, before the comma in the IFERROR function, create a formula without using a function that divides the amount of cash gifts (cell B5) by the total amount of gifts (cell B11). b. Use an absolute reference to cell B11 in the formula. c. Use the Fill Handle to fill the range C6:C10 with the formula in cell C5