Consider a four$-$step serial process with the number of workers at each step and processing times given in the following table.

$\backslash$table$[[,,$Time per Customer $($in$],[$Process Step,Number of Workers,$7],[1,1,17],[2,3,10],[3,5,10]]$

Assuming that the process starts out empty and is worker$-$paced, how long will it take $($in minutes$)$ to serve $28$ customers? Note: Round to nearest minute.