The average qualifying speed for a championship NASCAR race is145.65 mph and the standard deviation is 9.45 mph. Only drivers whoobtain z-scores greater than 1.2 will qualify for the race. If thespeeds are normally distributed what minimum speed must be clockedto compete for the trophy?a. 146.9 mphb. 155.2 mphc. 157.0 mphd. 174.8 mph