Starting salaries (in thousand dollars) of recent college graduates in electrical engineering and software engineering are compared. Summary statistics are given below. Electrical engineering: m 24. = 53.8, s, 10.2 Software engineering: 21.9 55.8.₂= 3.3 1 pts Assume normal populations with unequal variances and construct a 90% confidence interval for difference of the means. Find the lower bound of the confidence interval in thousand dollars (round off to second decimal place).