Could I please get help with this question?

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 a. 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 b. Find the mean of the 0.172 75,000 to 99,999 distribution: 0.125 100,000 to 149,999 0.149 c. Find the standard deviation of 150,000 to 199,999 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)