Answer T or F $($True or False$)$

$1.$ Asymmetric encryption requires a public$-$private key pair

$2.$ With concurrent access, the calculation of the L$2$ access time does not require you to add L$1$ access

time$+$L$2$ access time.

$3.$ All processes from outside local computer are untrusted until they have proven their authenticity

$4.$ One of the important tasks done for synchronization by OS has to do with how processes share

computer $1/$O and memory resources