$(4$ pts$)$ Becky takes out a $30-$year mortgage for which her monthly payment is $$1400.$ During the early years of the mortgage, most of each payment is for interest and the rather small remainder is for principal. As time goes on$,$ the portion of each payment that goes to Interest decreases while the portion for principal increases, as shown in the following graph:

a$.$ At the beginning of the loan, approximately how much of the $$1400$ monthly payment goes toward principal?

proximately how much of the $$1400$ monthly payment goes for interest in year $5?$

Wat year will the monthly payment be equally divided between interest and principal?