clock configuration for the MSP430 board. Whne it refers to "b" it is talking about the pin 5 below

d) Write a C function that expressly turns on both XT1 and XT2 (see UCSCTL6) and sets the frequency of MCLK and SMCLK to as close to 21.5 MHz as you can. Explain whether you used XT1 or XT2 as source for DCO REFCLK and why. Assume all other clock settings are to be left in their default state. You may still assume that P5.5-2 are set as shown in (b) at the top of configDisplay() and do not have to be configured by your function PSSEL | = (BITS | BIT4|BIT3| BIT2); d) Write a C function that expressly turns on both XT1 and XT2 (see UCSCTL6) and sets the frequency of MCLK and SMCLK to as close to 21.5 MHz as you can. Explain whether you used XT1 or XT2 as source for DCO REFCLK and why. Assume all other clock settings are to be left in their default state. You may still assume that P5.5-2 are set as shown in (b) at the top of configDisplay() and do not have to be configured by your function PSSEL | = (BITS | BIT4|BIT3| BIT2)