need Urgently

Q1. From the given frequency distribution of students weight: Weights(pounds) No. of students 118-126 3 127-135 136-144 9 145-153 12 154-162 5 163-171 172-180 a) Obtain first four moments (i) about Zero, (ii) about 149, and (iii) about mean. b) Now using the relation given below, convert the moments about 149 to moments about mean and show that results are exactly same as obtained in (iii) 1. m, = m'] - m, = 0 2. my = m'2 - m'i? 3. m, = m'3 - 3m',m'] + 2 m'] 4. m, = m', - 4m'3m'] + 6m'2 m']- -3 m']* c) Also obtain moment ratios bl=m32/in23 and b2=14/in2, what can you say about symmetry and kurtosis in this distribution d) Obtain coefficient of skewness by Bowley's and Karl Pearson's methods and explain the skewness using both approaches