An office has introduced new software to record working time. The 'total time worked' column should automatically populate with the hours and minutes worked that day but it is not working so needs to be completed manually. Any time worked over an employee's contracted hours is accrued and can be taken as leave at a later date. Below is a record of the hours an employee worked last week.

$\backslash$table$[[$Day$,$Morning Start,$\backslash$table$[[$Morning$],[$Finish$]],$Afternoon Start,Afternoon Finish,Total Time Worked$],[$Mon$,07$:$05,12$:$40,13$:$10,17$:$30,],[$Tues$,09$:$20,13$:$30,14$:$00,17$:$10,],[$Weds$,08$:$40,12$:$30,13$:$00,17$:$15,],[$Thurs$,07\mathrm{.}00,13$:$00,,,],[$Fri$,08$:$15,12$:$30,13\mathrm{.}00,17$:$30,]]$

How long was the employee's average working day?

$07$:$21$

$07\mathrm{.}24$

$0801$

$08\mathrm{.}05$

$0824$