Explain how psychologists can use both longitudinal studies and cross-sectional studies to examine human behavior across the life span. Give an example of each. PLEASE ANSWER ALL PARTS

Julian and morgan obtain a 30-year 4/1 arm at 3.9% with a 3/13 cap structure in the amount of $182,345.? what is the remaining balance on the mortgage after the first four years? $141,062.12 $168,476.64 $172,148.77 $173,946.01