How many strings of six lowercase letters from the english alphabet contain
a) the letter a?
b) the letters a and b?
c) the letters a and b in consecutive positions with a preceding b, with all the letters distinct?
d) the letters a and b, where a is somewhere to the left of b in the string, with all the letters distinct?

Read the paragraph. the runner won the marathon. exhausted and drenched with sweat from the exertion, she was the first to cross the finish line. the spectators roared with delight and, lifting her onto their shoulders, marched the proud athlete to the winner's podium. the paragraph is an example of what drafting technique? hexagonal writing the see method cubing color-coding