Find the laplace transform of f(t), wheref(t) = 1 for 0 < t < a

• A. n-1 for a < t < 2a
• B. ( frac{1}{s} coth u2061( frac{as}{2}) )
• C. ( frac{1}{s} sinh u2061( frac{as}{2}) )
• D. ( frac{1}{s} e^{-as} )
• E. ( frac{1}{s} tanh u2061( frac{as}{2}) )