CUSIP No. 74371L109
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Exhibit A
AGREEMENT REGARDINGTHE JOINT FILINGOF SCHEDULE 13G AMENDMENT NO. 1
The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit to this Schedule 13G Amendment No. 1 to evidence the agreement of the below-named parties, in accordance with the rules promulgated pursuant to the Securities Exchange Act of 1934, to file this Schedule jointly on behalf of each such party.
Date: February 13, 2018
[Signature Pages Follow]
CUSIP No. 74371L109
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IN WITNESS WHEREOF, the parties hereto have executed and delivered this Agreement as of the date first written above.
| /s/ Mitch Mumma |
| Mitch Mumma |
| /s/ Dennis Dougherty |
| Dennis Dougherty |
| INTERSOUTH PARTNERS VI, L.P. | ||
| By: | Intersouth Associates VI, LLC, | |
| its general partner | ||
| By: | /s/ Mitch Mumma | |
| Name: | Mitch Mumma | |
| Title: | Member Manager |
| INTERSOUTH ASSOCIATES VI, LLC | ||
| By: | /s/ Mitch Mumma | |
| Name: | Mitch Mumma | |
| Title: | Member Manager |
