I need the microcontroller role in Ecg device and preform the task using PICC (use PIC18 microcontroller) and simulation circut in any circuit maker softwere

Please choose a biomedical microcontroller based device and do the following: 1- draw the block diagram of the device. 2- show and explain the role of the microcontroller in the device. 3- program your microcontroller to perform the task using PICC (use PIC18 microcontrollers). 4- create a simulation circuit using proteous or other circuit maker software to run a simulation