$(12)$ Implement the following differential equation in Simulink

$4\frac{dy}{dx}+3y=7$

$(13)$ Implement the following differential equation in Simulink

$\frac{d^{2}y}{d{x}^2}+2\frac{dy}{dx}+4y=3$

$(14)$ Model a Binary Phase Shift Keying $($BPSK$)$ using Simulink.

$(15)$ Implement a Frequency modulator using Simulink.

Plot the message signal, carrier signal and the modulated signal.

$(16)$ Implement an Amplitude modulator using Simulink. Plot the message signal, carrier signal and the modulated signal for under modulation condition.

$($solve all questions step by step $)$