Excel file of question

Four years ago Southside Hospital sold 20 year 6% annual coupon bonds at par.
The bonds had a $1,000 par (face) value and today sell for $950. The market rate
for the bonds does not change during year 5 (from today until the end of the year).
a. What is yield to maturity on the bonds? (2)
b. What was the current yield and the capital gains yield for the year (year 5)? (5)
c. The bonds are callable in 6 years at a 2% premium. What is the Yield to Call? (3)