Can I please have help with parts A B and C only?

MAT 133: Ch. 3 Review WS p.4 3. The following distribution shows the yearly income per household for all the households in the U.S. in 2018 (Source: https://www.census.gov/) Household Income ($) Midpoints Relative Frequency . Find the midpoints and place Under 15,000 0.102 them in the table. Be careful!!! 15,000 to 24,999 0.089 Class width is NOT consistent in 25,000 to 34,999 0.088 this table. 35,000 to 49,999 0.12 50,000 to 74,999 0.172 b. Find the mean of the 75,000 to 99,999 0.125 distribution: 100,000 to 149,999 0.149 150,000 to 199,999 c. Find the standard deviation of 0.07 the distribution: 200,000 and over 0.085 d. Interpret the mean and standard deviation in the context of the situation. (give units) 4. The birthweight of babies in the U.S. is normally distributed with a mean of 7.17 pounds and a standard deviation 0.83 pounds. (Source: https://www.cc.govchs/datavsrvsr68vsr68 13-508.pdf) a. Draw a reasonable picture of the distribution with parameters and percentages properly marked and labeled, up to 3 standard deviations from the mean. b. Roughly 95% of all newborns weigh between and pounds c. What percentage of newborns weigh less than 5.51 pounds? d. Would it be unusual for a baby to weigh more than 8 pounds? Explain