Matlab: Analysis of signal

Question

Hi, I have a problem with this task:

For free route perform frequency analysis and give parametrs of each signal component:

• time of beginning and ending of each component
• beginning and ending frequency
• amplitude (in time domain) in the beginning and end of each signal's component
• level of noise in dB

Assume, that, the parametrs of each component like amplitude, frequency is changing lineary in time. Frequency of sampling is 1000Hz

For example I have signal like this:

Nx=64;
fs=1000;
t=1/fs*(0:Nx-1);

%==========================
A1=1;
A2=4;
f1=500;
f2=1000;

x1=A1*cos(2*pi*f1*t);
x2=A2*sin(2*pi*f2*t);
%==========================
x=x1+x2;