Pat, Kate, and Mark charged a total of 126 hours to a certain project. If Pat charged twice as much time to the project as Kate and 1/3 as much time as Mark, how many more hours did Mark charge to the project than Kate?	Choose the most appropriate option
A) 18  B) 36  C) 72  D) 70  E) 108
70   all u do is do   2:1:6=&gt;2x+x+6x=126=&gt;x= 14   28:14:84   84-14= 
<gadget id="calculator">84-14</gadget>
<output>70</output>
70   Answer 70
<result>D</result>
Pat, Kate, and Mark charged a total of 126 hours to a certain project. If Pat charged twice as much time to the project as Kate and 1/3 as much time as Mark, how many more hours did Mark charge to the project than Kate?