Question: how to plot fourier transform in maple?

if  i use a fourier transform to find an integral representation for the solution is  U(x,t)=1-1/2*erf((x+a)/(2*square rootkt))+1/2*erf((x-a)/(2*square rootkt)), can you plot the sloution on the interval -5<=x<=5 with k=10^-6 and a=1 for t=10^5 and t=10^6 , give me two graph? erf mean is  Error function !

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