Thank you for your help! Here you go.
diskutil list
Last login: Mon Feb 1 20:00:32 on ttys000
firstname-lastname-MacBook-Pro:~ firstnamelastname$ diskutil list
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *320.1 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 298.5 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data BOOTCAMP 20.7 GB disk0s4
diskutil cs list
No CoreStorage logical volume groups found
sudo gpt - vv - r show /dev/disk0
firstname-lastname-MacBook-Pro:~ firstnamelastname$ sudo gpt -vv -r show /dev/disk0
WARNING: Improper use of the sudo command could lead to data loss
or the deletion of important system files. Please double-check your
typing when using sudo. Type "man sudo" for more information.
To proceed, enter your password, or type Ctrl-C to abort.
Password:
gpt show: /dev/disk0: mediasize=320072933376; sectorsize=512; blocks=625142448
gpt show: /dev/disk0: Suspicious MBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 625142447
start size index contents
0 1 MBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 582977712 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
583387352 1269544 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
584656896 40484864 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
625141760 655
625142415 32 Sec GPT table
625142447 1 Sec GPT header
sudo disk /dev/disk0
Disk: /dev/disk0 geometry: 38913/255/63 [625142448 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] <Unknown ID>
2: AF 1023 254 63 - 1023 254 63 [ 409640 - 582977712] HFS+
3: AB 1023 254 63 - 1023 254 63 [ 583387352 - 1269544] Darwin Boot
4: 0C 1023 254 63 - 1023 254 63 [ 584656896 - 40484864] Win95 FAT32L