$25$

$10$

$800$:$39$:$25$

A time study was conducted on a task that consists of four elements. The observations and performance ratings for six cycles are shown in the following table.

$\backslash$table$[[,,$Observations $($minutes per cycle$),],[$Element$,$Performance Rating,$1,2,3,4,5,6],[1,90\%,0\mathrm{.}44,0\mathrm{.}50,0\mathrm{.}43,0\mathrm{.}45,0\mathrm{.}48,0\mathrm{.}46],[2,85,1\mathrm{.}50,1\mathrm{.}54,1\mathrm{.}47,1\mathrm{.}51,1\mathrm{.}49,1\mathrm{.}52],[3,110,0\mathrm{.}84,0\mathrm{.}89,0\mathrm{.}77,0\mathrm{.}83,0\mathrm{.}85,0\mathrm{.}80],[4,100,1\mathrm{.}10,1\mathrm{.}14,1\mathrm{.}08,1\mathrm{.}20,1\mathrm{.}16,1\mathrm{.}26]]$

a$.$ Calculate the average time for each element. $($Round the final answers to $2$ decimal places.$)$

References

b$.$ Calculate the normal time for each element. $($Round the final answers to $3$ decimal places.$)$

$\backslash$table$[[$Element$,$Performance Rating,NT$],[1,90\%,$minutes$],[2,85,$minutes$],[3,110,$minutes$],[4,100,$minutes$]]$