Three Different Faults

A hardware-managed TLB walks the page table and finds these entries. All three accesses miss the TLB.

VPN	valid	present	protection
0x1	1	1	read only
0x2	1	0	read/write
0x3	0	-	-

1. a store into a byte on VPN 0x1
2. a load from a byte on VPN 0x2
3. a load from a byte on VPN 0x3

Which exception does each raise?