A game show host has developed a new game called "Grab All You Can." Here's how it works: a contestant reaches his dominant hand ( i. E. Right hand for right-handed people) into a jar of $10 bills and grabs as many as he can in one handful. Then he does the same thing with his non-dominant hand in a jar of $20 bills. Research with many volunteers has determined that the mean number of $10 bills drawn in 68 with a standard of 9.5, and the mean number of $20 dollar bills is 58, with a standard deviation of 7.8. a) If D = the amount of money, in dollars, that a randomly-selected contestant grabs from the "$10 grab," find the mean and standard deviation of D.