CREATE TABLE "chip_model" (
"Model_name" text,
"Launch_year" real,
"RAM_MiB" real,
"ROM_MiB" real,
"Slots" text,
"WiFi" text,
"Bluetooth" text,
PRIMARY KEY ("Model_name")
)

CREATE TABLE "screen_mode" (
"Graphics_mode" real,
"Char_cells" text,
"Pixels" text,
"Hardware_colours" real,
"used_kb" real,
"map" text,
"Type" text,
PRIMARY KEY ("Graphics_mode")
)

CREATE TABLE "phone" (
"Company_name" text,
"Hardware_Model_name" text,
"Accreditation_type" text,
"Accreditation_level" text,
"Date" text,
"chip_model" text,
"screen_mode" text,
PRIMARY KEY("Hardware_Model_name"),
FOREIGN KEY (`screen_mode`) REFERENCES `screen_mode`(`Graphics_mode`),
FOREIGN KEY (`chip_model`) REFERENCES `chip_model`(`Model_name`)
)
SELECT max(T1.RAM_MiB) ,  min(T1.RAM_MiB) FROM chip_model AS T1 JOIN phone AS T2 ON T1.Model_name  =  T2.chip_model WHERE T2.Company_name = "Nokia Corporation";
What is maximum and minimum RAM size of phone produced by company named "Nokia Corporation"?