this is the whole question (need answers for part C)

The New York Choral Society in 1979 collected data on heights (in inches) of the singers. The data were grouped according to voice part. The vocal range for each voice part increases in pitch according to the following order: Bass, Tenor, Alto, Soprano. A. (3 Marks) Below is the histogram of heights of sopranos. Describe this distribution. Histogram of Heights of Sopranos & Frequency LO 60 62 64 66 68 70 Heights of Sopranos B. (3 Marks) Below is the summary statistics for each voice group. > favstats (height ~ voice. part) voice. part min Q1 median Q3 max mean sd n missing Alto 60 64 65 67 72 65. 38710 2. 651043 62 Bass 66 69 71 72 75 70. 98462 2. 515529 65 AUNH oooo Soprano 60 62 65 65 70 64. 12121 2. 180439 66 Tenor 64 68 69 71 76 69. 40476 2. 785498 42 i. What is the median of the heights of bass singers? ii. What is the IQR of the heights of tenor singers? iii. What is the standard deviation of the heights of alto singers? Give an answer correct to 2 decimal places.C. (4 Marks) Below are the sidebyside boxplots for the heights of the four voice parts. Look at the boxplots and split them into two groups, where each group contains two voice parts, and the plots are similar within in each group. I 75' - 70' ' E - DJ 'E .C BU- Alto Bass Soprano Tenor voice.part i. What two voice parts are in one group? ii. What two voice parts are in the other group? iii, What is the main difference between the two groups? Can you think of an explanation for this difference