The MSI (multispeed internal) oscillator clock is used as the system clock source after startup from Reset, wake-up from Stop or Standby low power modes. The MSI clock signal is generated from an internal RC oscillator. Seven frequency ranges are available: 65.536kHz,131.072kHz, 262.144kHz,524.288kHz,1.048MHz,2.097MHz (default value) and 4.194MHz. [30] (a) If the 4.194MHz (i.e., 4220 ) MSI clock is selected as the system clock and the SysTick selects this clock, what should the SysTick LOAD register be to generate a SysTick interrupt every microsecond? (b) If the 4.194MHz (i.e., 4220 ) MSI clock is selected as the system clock and the SysTick selects this clock, what should the SysTick LOAD register be to generate a SysTick interrupt every 4 milliseconds (4103 second ) ? (c) The SysTick is a 24-bit down counter. If 4.194MHz MSI is used as the SysTick's input clock, can the Sys Tick generate an interrupt every minute? Give your explanation