1.If i stretch my .25 meter resistance bank .12 meters, what is its % in strain?

2.if i really stretch my .25 meter resistance band 1.2 meters, what is its % strain?

3. my active dorsi flexors result in 100 lbs of tensile force on my achille tendon which has an area of 2 cm^2. How much stress is it experiancing (in Mpa) ?

4.My biceps pulled on my flexor tendon with 300 lbs of force. if my tendon has an area of 1.5 cm^2 how much stress is it experiancing? (in mpa)?