$($Question $1)20$ points

Find the indicated derivatives if $A$ is a real number constant.

a$.\frac{d}{dt}(\frac{ln(t2)}{4t^2})$

b$.$ For $y=$Asec$(Ax)cos(sin(Ax)),$ find $y.$

c$.$ For $f(x)=\frac{1}{e^x{e}^x},$ find $f^{\text{'}}(x)$

d$.$ Find $\frac{d^3}{d{}^3}(sin(A))$

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