Below is a partial solution by Laplace transform of an initial value problem (IVP) with a missing part labelled "A". Enter the missing part to complete the correct solution of the IVP. The missing part may be a valueumber/expression. Do not put unnecessary spaces/symbols. IVP : y"'- 4y = 0 , y(0) = y'(0) =72 Solution by Laplace transform: STEP REASON L(y" - 4y} = L{0} Take the Laplace of both sides. L(y"') - 4L ( y }=0 ($2 F (s) - ( A) - (A) ) - 4F (s) = 0 Laplace of derivatives. ($2 - 4) F(s) = As + A As+ A F (s) = Solve for F(s) . $2 - 4 What is the missing part "A" in the Laplace transform