URGENT! please solve ASAP

Note: Please, use 4 decimal points in answering the questions in this problem. As a project requirement in the course of ERGONOMICS, you are asked to establish the surface height of a keyboard so that the sitting operator has the forearms and wrists horizontal. Assume that having tops of the keys at elbow height will allow the operator to keep the wrists straight, forearms horizontal, and upper arms effortless hanging down. Moreover, from available Anthropometrical data, we have the elbow height of females has a mean of 65 cm with standard deviation of 2.7 cm; and males 74 cm with standard deviation of 3 cm. Use ANTHROPOMETRY design and apply the principle design for adjustable range between the 10 TH and 90'TH percentiles for the top of the keys. Q1)-Females 10 TH Percentile? ANSWR-15 Female 10TH Percentile Q2)- Females 90'TH Percentile? ANSWR-2 Female 90'TH Percentile Q3)- Males 10 TH Percentile? ANSWR-3= Mate 10TH Percentile 04)- Males 90 TH Percentile? ANSWR-4 V Male 90 TH Percentile Q4)- Males 90'TH Percentile? ANSWR-4= Male 90'TH Percentile Q5)-The distance the keyboard surface can be raised in cm? ANSWR-5= Range of Adjustability in cm. Hint: Use the following table for percentile calculation. Percentile Equation used in Calculation Percentile +2.326 0 1'st 99'th 2'nd 2.054 0 98'th 5'th +1.6450 95'th 10'th 1.282 0 90'th 15'th H + 1.036 0 85'th 25'th 1 0.674 0 75'th 30'th H 0.524 0 70'th 35'th +0.3850 65'th 40'th H +0.253 a. 60'th 50'th Note: y: The Average or Mean, and o: The Standard Deviation