AT SUCH AS

hello

i'm having a problem with AT SUCH in the following phrases, could you tell me which are correct and why

1 The only way to overcome this was to take the bend at such a speed as to induce a skid/so as to induce a skid/at such a speed that it would induce a skid (which would be correct)
2 he should keep his automobile at such a speed as would make it possible for him to...
3 he took the bend as fast as to induce a skid
4 he drove at such speed as indicated on the sign
5 he will be able to connect and operate at such speed as determined by the network/at the speed determined by the network

if someone could help me with these i'd be grateful

thank you