which following is true about Node.js clustering? 1- A single instance of Node.js runs in a single thread. 2-To take advantage of multi-core systems, it is available to launch a cluster of Node.js processes to handle the load. 3-The cluster module allows easy creation of child processes that all share server ports. 4-All of the above ------------------------- let racer = function() { setTimeout(() => console.log("timeout"), setImmediate(() => console.log ("immediate")) ; process.nextTick(() => console.log("nextTick")) console.log( "current event loop") } racer(); Choose the best option 1- timeout, immediate, nextTick, current event loop 2- immediate, timeout, nextTick, current event loop 3- timeout, immediate, current event loop, current event loop 4- current event loop, nextTick, timeout, immediate 5- Syntax Error ---------------------- What styling method is not used in React? 1- by className 2- by inline styles 3- style bindings 4- css-in-Is 5- 3rd party libraries for styling components such as StyledComponents, Radium, (ssModules, etc.