Write a matlab function b = ubitname hw6 p3(a, p) that accepts a matrix a and returns the rank-p matrix b that is the best approximation to a in the 2-norm. if the requested rank p is larger than rank(a) simply return matrix a. you may use the matlab functions svd, diag, rank, zeros, and size to produce the result. you may not use any other built-in matlab function. note that commands like if, for, etc are not considered matlab functions. note: you may consider that any singular value below 10−14 as zero. upload your code to ublearns.

1. which of the following statements are true about routers and routing on the internet. choose two answers. a. protocols ensure that a single path between two computers is established before sending packets over it. b. routers are hierarchical and the "root" router is responsible for communicating to sub-routers the best paths for them to route internet traffic. c. a packet traveling between two computers on the internet may be rerouted many times along the way or even lost or "dropped". d. routers act independently and route packets as they see fit.