can you please assist with my Business assignment as well as the working please

many thanks

(b) The researcher suggests using class intervals as 10-15, 15-20, ..., 35-40 for the hours per week variable and class intervals 50-55, 55- 60, ..., 75-80 for the yearly income variable. Explain how the researcher would have decided the width of the above class intervals (or class width). (c) Draw a histogram for each variable using appropriate BIN values from part (b) and comment on the shape of the two distributions