Explain the following in depth.

1- In the absence of inflation and risk, the interest rate that equates the level of saving to the level of borrowing is the basic interest rate or real interest rate.

2- The inflationary past, back in 80s people used to pay mortgage 20%, and now a very lower rate. the difference is inflation. So even though your savings is earning a much lower rate today, when you adjust for inflation the difference is pretty much disappear