Alyson's Pet Sitting Service

$\backslash$table$[[\backslash$table$[[$Number of$],[$Workers$]],\backslash$table$[[$Output $($number$],[$of pet visits$)]]],[0,0],[1,20],[2,45],[3,60],[4,70]]$

Refer to Table $13-1.$ Suppose that Alyson's pet sitting service has a fixed cost of $$50$ per month for her cell phone. Each worker costs Alyson $$60$ per day. What is the shape of Alyson's total cost curve as output increases from $45$ to $70?$

Total cost increases but gets flatter.

Total cost increases and gets steeper.

Total cost decreases and gets flatter.

Total cost decreases but gets steeper.