CREATE TABLE ACCOUNTS (
    custid      BIGINT      NOT NULL PRIMARY KEY,
    name        VARCHAR(64) NOT NULL
)

CREATE TABLE SAVINGS (
    custid      BIGINT      NOT NULL PRIMARY KEY,
    balance        FLOAT       NOT NULL,
    FOREIGN KEY (custid) REFERENCES ACCOUNTS (custid)
)

CREATE TABLE CHECKING (
    custid      BIGINT      NOT NULL PRIMARY KEY,
    balance        FLOAT       NOT NULL,
    FOREIGN KEY (custid) REFERENCES ACCOUNTS (custid)
)
SELECT T3.balance FROM accounts AS T1 JOIN checking AS T2 ON T1.custid  =  T2.custid JOIN savings AS T3 ON T1.custid  =  T3.custid ORDER BY T2.balance DESC LIMIT 1
What is the savings balance of the account belonging to the customer with the highest checking balance?