a) Connect 3 LEDs to the ports PA4, PA5 and PA6 of the STM324 processor. Draw the figure.

b) Write the code that turns these LEDs on and off respectively.

c) Write the program code that flashes the LEDs connected to the port pins from PB1 to PB4 in relation to the 4 buttons connected to the port pins from PD1 to PD4.

d) After the button is pressed and pulled, keep the relevant led on for the duration of the hold, then write the function that turns off.

e) Write the SystemInit function that makes the necessary conditions to adjust to 164Mhz cpu, 84Mhz AHB1, 42Mhz APB1 and 42Mhz APB2 frequencies using 8Mhz xtal.