please show how to calculate with a financial calculator

Question 6. Pecos Company has just issued a 10-year, 10 percent coupon rate, $1,000- par bond that pays interest semiannually. Three years later, if the going rate of interest on the bond falls to 8 percent, what is the value of the bond? Question 7. Karen just bought a 10-year, 5% coupon bond with $1,000 par for $825. If she sells this bond four years later for $950, what is her realized yield in year 4 (with semi-annual interests)