The lifespans of certain 350 sample cricket insects are normally distributed. it is found that 15% of the sample cricket insects has a lifespan less than 120 hours and 10% of the sample crickets last...

The lifespans of certain 350 sample cricket insects are normally distributed. it is found that 15% of the sample cricket insects has a lifespan less than 120 hours and 10% of the sample crickets last more than 216 hours. Find the mean and standard deviation of the lifespan of the sample crickets.