Can someone please help me to solve these questions, I have answers but do not know how it came to these values.

Sean is 60 and is thinking about retiring. His CPP statement indicates that he would qualify for CPP income of $667 per month at age 65. What would his annual CPP income be if he retired early at age 63? (Input to the nearest dollar.)

Correct Answer:

6,851 1

Shauna immigrated to Canada in her 30s and has worked full time earning above YMPE throughout. Now she is a few years from retirement and has found out that her monthly OAS at age 65 will be $474. What amount of annual OAS will she qualify for if she delays retiring until age 67? Assume her annual retirement income will be under $75,000 and input to the nearest dollar.

Correct Answer:

6,507 1