Impulse response and afr

Hello, i need help at two graphic both in x axis how to put time in impulse response like in first image and at AFR graphic put that frequency like in first image. First image:

Second image what i have:

Code:clc

N=512; %Number samples

Fd=40e3; %Smpling frequency

f1=700; %Frequencies of signal components

f2=14000;

%Filtr parametres

A=[1.000000 -2.782514 3.966808 -3.405150 1.875863 -0.650946 0.130852 -0.011663];

B=[0.00096289 0.00674026 0.02022078 0.03370129 0.03370129 0.02022078 0.00674026 0.00096289];

%Discrete time samples

n=0:N-1

%Generate discrete delta functiom a single pulse

u=[1 zeros(1,N-1)];

%Calculate impulse response

h=filter(B,A,u) %Impulse reaction determination

H=freqz(B,A,n/(N-1)*pi,14000); %AFR(Amplitude frequency curve)

%AFR

figure(1),subplot(211), plot(abs(fft(h)/N))

%Impulse response

subplot(212), plot(h)

title('Impulse response')

xlabel('Time, sec'); ylabel('Impulse response');

xlim([0 200])