HelloWe 're going to buy 4 fpr9k-sm56-ftd-bun appliance and we want to install FTD image on it (not ASA image).We want to know how many contract (CON-SNT-FPR9KSUP, CON-SNT-PR9KSM6F, CON-SNT-FPRC93AC) we should buy? Do we have to buy 4 contract(one co...