Pick the correct statements regarding cell references. 1) a relative reference will retain its references when copied to another cell. 2) an absolute address has a $ sign before both the row and the column values. 3) = a1 + $b$2 is an example of a mixed cell reference. 4) the address 7b is invalid.

Helen is having a meeting with her colleagues in her company. they are working on the goals and objectives for the coming year. they want to ensure that these goals and objectives of the processes involved are properly evaluated. which system can helen and her colleagues apply to evaluate this? helen and her colleagues require a blank to evaluate the goals and objectives.