? Brittany created a formula with the VLOOKUP function to look up an employee names by
their Employee ID. She also wants to alert users when they enter an incorrect ID
number.
In cell Q4, nest the existing VLOOKUP function in an IFERROR function. If the VLOOKUP
function returns an error result, the text Invalid Employee ID should be displayed.
? Brittany wants to determine several totals and averages for active employees.
In cell Q9, enter a formula using the COUNTIF function and structured references to
count the number of employees who can work as lifeguards.
D. In cell R9, enter a formula using the AVERAGEIF function and structured references to
determine the average number of years of experience for lifeguards.
1. In cell R10, enter a formula using the AVERAGE function and structured references to
determine the average number of years of experience of all employees as shown in the
Years of Experience column.
