Before trying anything else, switch all four of those breakers completely off and then on. Many models of breakers do not visibly trip: to reset them, they need to be shut off first.
If that doesn't work, take the panel cover off to see what is going on inside. Be careful not to touch any exposed bare metal wires, especially near the main breakers. Look for disconnected wires (especially on the dead circuits). If they all seem connected, check for loose wires by gently wiggling each wire one at a time by grasping on the insulation near the connection.
Each circuit has a white wire which goes into a terminal strip which is the neutral and ground bus, like at both sides of the photo (from here). Wiggle all those wires too. If there are separate bus bars, they will be connected together with a wire (unless this is not the main service panel). Carefully scrutinize all the connections into the bus bars.
It does not make sense that all four circuits failed and are clustered together in the panel like that. If one phase of the 240 volt service failed, it would affect every other circuit, both left side and right sides. Also, probably none of the 240 volt appliances would work right.
If all the connections are fine, obtain an AC voltmeter and check that there is 120 volts (±10%) between each breaker terminal and neutral. If all four of those breakers are providing voltage but the circuits are dead, there is a break between that end of the wire and the outlets. Maybe those wires go through a junction box which is disconnected? It might be necessary to look inside every junction box, switch, and outlet box until the problem is found.