$1$ A meat processing plant has $200$ workers. $170$ of them work on the shop floor, while the remainder

work in administration. $80\%$ of the people working on the shop floor use knives to cut whole animals

into smaller pieces and to debone, putting them especially at risk of carpal tunnel syndrome $($CTS$).$

$70\%$ of the shop people using knives have CTS$,$ while $80\%$ of the shopworkers who don't use knives

have no problems. $40\%$ of the people working in administration do a lot of computer work, putting

them at risk of CTS as well, and $2$ of them have developed CTS$,$ while $1$ of the others working in

administration has CTS as well.

Create appropriate tables and use them to calculate the following:

a$.$ Calculate the odds ratio of CTS for shop workers only

b$.$ Calculate the relative risk of CTS for shop workers only

c$.$ Calculate the odds ratio of CTS for all workers

d$.$ Calculate the relative risk of CTS for all workers